How to compress images in microsoft powerpoint

Learn about video compression options in PowerPoint 2016 for Windows.

Author: Geetesh Bajaj

Product/Version: Microsoft PowerPoint 2016

OS: Microsoft Windows 7 and higher

Date Created: June 12, 2017
Last Updated: June 12, 2017

Recent versions of PowerPoint accept more video file formats than previous versions, and can do a lot more with videos, including trimming of video clips. However, it also embeds all inserted video clips by default, and this can result in huge presentations that contain huge video files! This ultimately occupies oodles of disk space and may also make PowerPoint work a wee bit slower. To tackle this problem, you can explore media compression abilities built right inside PowerPoint. You no longer need any third-party media compression tool since PowerPoint’s native Media Compression options make this task very easy indeed.

Follow these steps to learn more about video compression options in PowerPoint 2016:

  1. Open a presentation where you have already inserted a video clip that you want to compress. Optionally, save your presentation as a new file if you also want to have an original, uncompressed version of the presentation.
  2. Now, access the File menu, and choose the Info Pane, as shown in Figure 1. Thereafter, click the Compress Media button, highlighted in red within Figure 1.

How to compress images in microsoft powerpoint
Figure 1: Compress Media button within the Info pane

How to compress images in microsoft powerpoint
Figure 2: Compress Media drop-down menu

The top three options within the Compress Media drop-down menu are explained below:

Presentation Quality: Helps save space and also at the same time maintains the overall audio and video quality.

Internet Quality: Video quality post compression is comparable to video typically streamed over the internet.

Low Quality: Produces video of very low quality hence can be used when file size is more important than quality.

How to compress images in microsoft powerpoint
Figure 4: Undo option to revert compression

See Also:

How to compress images in microsoft powerpoint

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Marshall Gunnell
How to compress images in microsoft powerpointMarshall Gunnell
Writer

Marshall Gunnell is a writer with experience in the data storage industry. He worked at Synology, and most recently as CMO and technical staff writer at StorageReview. He’s currently an API/Software Technical Writer at LINE Corporation in Tokyo, Japan, runs ITEnterpriser, a data-storage and cybersecurity-focused online media, and plays with development, with his RAID calculator being his first public project. Read more.

How to compress images in microsoft powerpoint

Compressing images in your Microsoft PowerPoint presentation can help reduce the overall file size of the presentation and save disk space on the device it’s stored on. Here’s how to compress images in Microsoft PowerPoint.

Note that this feature is only available for desktop versions of Office and not Office for the web.

Compress Images in PowerPoint for Windows

Open the PowerPoint presentation that contains the images you’d like to compress and then select a photo.

How to compress images in microsoft powerpoint

Once selected, you’ll automatically be in the “Picture Format” tab. Here, click the “Compress Pictures” button in the “Adjust” group.

How to compress images in microsoft powerpoint

The “Compress Pictures” window will appear. In the “Compression Options” group, you can choose if the compression applies only to the selected picture. If you uncheck this option, PowerPoint will compress all of the images in the presentation, which overrides any changes you may have made to those images.

In the “Resolution” group, choose which resolution you would like to use. Once ready, click “OK.”

How to compress images in microsoft powerpoint

The image or images will now be compressed.

Compress Images in PowerPoint for Mac

Open the PowerPoint presentation that contains the images you’d like to compress and then select a photo. Once selected, click “Compress Pictures” in the “Picture Format” tab.

How to compress images in microsoft powerpoint

The “Compress Pictures” window will appear. Select the picture quality you’d like to use, then select if you’d like to apply the compression to all images in the presentation or only the selected image. Also, if you want to delete the cropped areas of the pictures, check the box next to that option.

When ready, click “OK.”

How to compress images in microsoft powerpoint

The image or images will now be compressed.

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How to compress images in microsoft powerpoint Marshall Gunnell
Marshall Gunnell is a writer with experience in the data storage industry. He worked at Synology, and most recently as CMO and technical staff writer at StorageReview. He’s currently an API/Software Technical Writer at LINE Corporation in Tokyo, Japan, runs ITEnterpriser, a data-storage and cybersecurity-focused online media, and plays with development, with his RAID calculator being his first public project.
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If the file size of your presentation is too large, try the following tips to make it more manageable.

Compress pictures in your presentation

Select a picture in your document. The Picture Format tab appears.

On the Picture Format tab, in the Adjust group, select Compress Pictures.

Under Compression options, do any of the following:

Make sure that Apply only to this picture is not selected so that the changes you make here will apply to all pictures in the document.

Select Delete cropped areas of pictures. This option removes the cropped picture data but note that if you delete the cropped picture data, you won’t be able to restore it.

Under Resolution, select Use default resolution.

How to compress images in microsoft powerpoint

Compress pictures in your presentation

Select a picture in your document. The Picture Format tab appears.

On the Picture Format tab, in the Adjust group, select Compress Pictures.

Under Compression options, do either of the following:

Make sure that Apply only to this picture is not selected so that the changes you make here will apply to all pictures in the document.

Select Delete cropped areas of pictures. This option removes the cropped picture data but note that if you delete the cropped picture data, you won’t be able to restore it.

Under Resolution, select Use default resolution.

How to compress images in microsoft powerpoint​​

Delete image editing data and lower default resolution

By default, when you edit an image, the data from the original is retained (to ensure the image can be restored). Discarding it means that you can’t restore the changes you make, but it will reduce your file size. Lowering the default resolution for images also reduces your overall file size.

Go to File > Options > Advanced.

Under Image Size and Quality, do the following:

Select Discard editing data. This option removes stored data that’s used to restore the image to its original state after it’s been edited. Note that if you discard editing data, you won’t be able to restore the image after you edit it.

Make sure that Do not compress images in file is not selected.

In the Default resolution list, select a resolution that is 150ppi or lower.

How to compress images in microsoft powerpoint

Reduce the character set of embedded fonts

To make your presentation more sharable with others who don’t have the same fonts in their system, it’s typical to embed the fonts you use. However, embedded fonts will increase your file size. To minimize the file increase, embed only those characters used in the presentation.

Go to File > Options > Save.

Under Preserve fidelity when sharing this presentation, select Embed fonts in the file, and then select Embed only the characters used in the presentation.

Note: If you’ve used custom fonts and want others to edit the presentation, select Embed all characters.

You can improve playback performance and save disk space by compressing your media files.

(This feature is available in PowerPoint for Windows, but not on PowerPoint for Mac or PowerPoint for the web.)

Open the presentation that contains the audio or video files.

On the File tab, select Info, and then in the Multimedia section, select Compress Media*.

* Embedded subtitles and alternate audio tracks are lost in this compression process.

How to compress images in microsoft powerpoint

To specify the quality of the video, which in turn, determines the size of the video, select one of the following:

Full HD (1080p) Save space while maintaining overall audio and video quality.

HD (720p) Quality will be comparable to media which is streamed over the Internet.

Standard (480p) Use when space is limited, such as when you are sending presentations via e-mail.

How to compress images in microsoft powerpoint

Figure: Media compression in progress

Open the presentation that contains the audio or video files.

On the File tab, select Info, and then in the Media Size and Performance section, select Compress Media*.

* Embedded subtitles and alternate audio tracks are lost in this compression process.

How to compress images in microsoft powerpoint

To specify the quality of the video, which in turn, determines the size of the video, select one of the following:

Presentation Quality Save space while maintaining overall audio and video quality.

Internet Quality Quality will be comparable to media which is streamed over the Internet.

Low Quality Use when space is limited, such as when you are sending presentations via e-mail.

How to compress images in microsoft powerpoint

Figure: Media compression in progress

Important: Certain older video file formats may not compress or export properly in Office on a Windows RT PC. Instead, use modern media formats such as H.264 and Advanced Audio Coding (AAC), which PowerPoint 2013 RT supports. Want to know what version of Office you’re using?

It is a good idea to reduce your file size in PowerPoint, especially if your presentation contains a lot of images, such as a digital photo album. Firstly, it takes longer time to load a presentation using many large picture files. Your computer may be freezing or crashing.

Compressing pictures in PowerPoint can quickly reduce the file size of your presentation. So, you can publish it through the internet quickly and open it fast. That is also what this article expects to show you.

Part 1: How to Compress Images in PowerPoint on Windows

There are several versions of PowerPoint using on PC, and the design is a bit different. Microsoft has changed the image compression feature since PowerPoint 2010. So, we share the workflows separately.

How to Compress Images in PowerPoint 2010/2013/2016/2019

Step 1 Open the presentation that you want to compress in PowerPoint. Select any picture in your presentation.

Step 2 Locate the top menu bar, go to the Format tab, and select Compress Pictures tool. Then you will be presented the compress pictures dialog.

Step 3 Uncheck the box next to Apply only to this picture if you want to batch compress all images in PowerPoint 2016. Check the Delete cropped areas of pictures option, which will compress images once your crop them. Next, select a proper Resolution preset. In most cases, E-mail(96 ppi) is the best choice. This option will compress the file size by the greatest margin.

How to compress images in microsoft powerpoint

Step 4 Click OK button to confirm it and go back to your presentation. Finally, press Ctrl + S buttons to save the compressed all images in PowerPoint.

Lost PowerPoint files before saving it? Just get the PowerPoint files recovery here.

How to Compress Pictures in PowerPoint 2007/2003

Step 1 Also, open the presentation in your PowerPoint 2003. Right-click on an image and choose Show Picture Toolbar . In PowerPoint 2007, once click a picture, the Picture Tools tab will be activated.

How to compress images in microsoft powerpoint

Step 2 Select the Compress Picture icon, which is the fifth button from the right side. That will trigger the Compress Pictures dialog.

How to compress images in microsoft powerpoint

Step 3 First of all, decide to apply compression to Selected pictures or All picture in document . Select Web/Screen under the Change resolution area if you do not want to print the presentation. Check the boxes next to Compress pictures and Delete cropped areas of pictures .

Step 4 After setting, click the OK button to close the popup dialog. Then save the presentation.

Part 2: How to Compress Images in PowerPoint on Mac

Though you can compress images in PowerPoint on Mac, the workflow is a bit various. Microsoft did not explain why the design of PowerPoint is different. Fortunately, it is not difficult to do it on Mac.

How to compress images in microsoft powerpoint

Step 1 Launch PowerPoint for Mac and open the PPT file that contains the images you want to compress.

Step 2 To compress all pictures in PowerPoint, unfold the File menu and select Compress Pictures or Reduce File Size .

Step 3 On the popup dialog, select Email(96 ppi) from the Picture Quality drop-down list. Tick the checkbox next to Delete cropped areas of pictures . Next, select All pictures in this file next to Apply to . If you choose Selected pictures only , the changes will be applied to selected images in your presentation.

Step 4 Finally, hit the OK button and save the presentation. Then you will find the file size becomes smaller.

Part 3: Compress Images including Background Pictures for PowerPoint Online

It cannot be denied that you can compress a picture or all images in PowerPoint. However, it is on the only image compressor. Apeaksoft Free Online Image Compressor, for instance, is a simple way to compress pictures for PowerPoint.

1. Compress up to 40 pictures at the same time online.

2. Free of charge without adding watermark on your pictures.

3. Protect image quality as much as possible while compressing.

4. Offer the seamless experience crossing Windows, Mac and Linux.

5. Support commonly used image formats, such as JPG, PNG, SVG and GIF.

Briefly speaking, Free Online Image Compressor is the easiest way to compress images for PowerPoint including background pictures.

How to Compress Images for PPT

Step 1 Open any web browser and access the online image compressor for PowerPoint.

Step 2 Launch an Explorer window, locate the large images that you want to use in PowerPoint, drag and drop them into the online image compressor page. Alternatively, click the Add Images button to upload your pictures.

How to compress images in microsoft powerpoint

Step 3 Once image uploading is done, the web app will start compressing them automatically. A few seconds later, you will be taken to the download page after image compression.

Step 4 You have two options to get the compressed images. To download each image separately, click the Download button on each file. Or you can download all compressed images for PowerPoint in package by hitting the Download All button.

Part 4: FAQs of Compressing Images in PowerPoint

Android Data Recovery And Restore FAQ

Question 1: How do I compress multiple pictures in PowerPoint?

Select the pictures that you want to compress, and follow the steps above to compress them in PowerPoint.

Question 2: Can PowerPoint files be compressed?

The easy way to compress your PPT file is simply reduce image file size with PowerPoint Picture Tools.

Question 3: How do I stop images from compressing in PowerPoint?

PowerPoint will compress your pictures automatically when you save the file. It makes animated GIFs stop working. To turn it off, go to the File menu and select Options . Head to the Advanced tab, find the Image Size and Quality option, and check Do not compress images in file .

This article discussed how to compress images in PowerPoint on Windows and macOS 11. Large PPT files may slow down your computer and are not convenient to use. In addition to compress all pictures in PowerPoint, there are more ways to downscale image file size for using in PowerPoint, such as Apeaksoft Free Online Image Compressor. It is not only easy to use, but also able to do it online. More questions? Please leave a message below.

When you try to add more than five slides with about four big pictures, your presentation file becomes bigger and bigger, and PowerPoint works slower and slower, wastes disk space needlessly, and hangs sometimes. Even if you insert to the presentation just a part of the picture and crop the rest, PowerPoint keeps all pictures even if you don’t see the rest of the picture.

Fortunately, PowerPoint offers the image compression utility that compresses all pictures in the presentation in a single step and reduces their resolution to the resolution specific for the type of output you specify (email, Screen, or Print).

To reduce resolution and compress images, do the following:

1. Select any picture, and the Picture Format tab appears:

2. On the Picture Format tab, in the Adjust group, click Compress Pictures:

3. In the Compress Pictures dialog box:

How to compress images in microsoft powerpoint

In the Compression options section:

  • To compress all pictures in the presentation, unselect the Apply only to this picture checkbox. To compress only selected picture, leave this checkbox checked.
  • To save invisible spaces of cropped-out areas of pictures, select the Delete cropped areas of pictures checkbox. When this checkbox is unchecked, PowerPoint just hides the “cropped” areas. Such “hiding” is good if you are planning to change cropped areas.

In the Resolution section, select the desired compression level:

  • High fidelity: preserves quality of the original picture
  • HD (330 ppi): good quality for high-definition (HD) displays
  • Print (220 ppi): excellent quality for most printers and screens
  • Web (150 ppi): good for web pages and projectors
  • E-mail (96 ppi): minimize document size for sharing
  • Use default resolution – use this to match the resolution of the pictures to the resolution defined in the PowerPoint options (see how to check this resolution at the bottom of this tip).

4. Click OK to perform the compression.

To see the default resolution, do the following:

1. On the File tab, click the Options button:

2. In the PowerPoint Options dialog box, on the Advanced tab, under Image Size and Quality, you can see the Default resolution:

How to compress images in microsoft powerpoint

If you have any questions or suggestions, please feel free to ask OfficeToolTips team.

How to compress images in microsoft powerpoint

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In this post, you’ll learn how to compress images in PowerPoint so that you can more easily share your presentation with other people. The same thing as reducing your file size.

That said, compressing images in PowerPoint is NOT always necessary.

If you are having ZERO trouble sharing your presentation with other people or are presenting from your own computer, there is no need to go through all of these steps.

This is still a valuable PowerPoint skill to learn, just keep in mind that it is not always necessary.

[Watch] Compressing Images in PowerPoint

Note: You can also greatly reduce your image file size by converting images from PNG to JPG before you compress them. JPG images are 5x to 10x smaller than their PNG equivalents.

To learn how to use PowerPoint as a PNG to JPG converter, read our guide here.

How to compress images in PowerPoint

Compressing images in PowerPoint is not hard, but there are a few different options you need to be aware of.

As a rule of thumb, the more you compress your images (to reduce your file size), the grainier (lower-quality) your images will appear in your presentation.

So while compressing your images can be important o save space, you don’t want to overdo it.

1. Open the Compress Pictures dialog box

Select your image in PowerPoint to open the Picture Format tab, then click the Compress Pictures command.

Keep in mind that the PowerPoint ribbon is contextual. That means that you first have to select an image or a picture before the Format Picture tab appears.

Also note that for the Compress Pictures command, depending on your screen resolution and the size of your screen, the command might just appear as an icon, without the Compress Pictures label, as pictured above.

2. Choose your the Compress Options

For your compression options, you have two choices (choose wisely). See descriptions below for details.

How to compress images in microsoft powerpoint

Apply only to this picture:

This is an important option to understand before you accidentally mess up all of the photos in your presentation.

Apply only to this photo (the default setting) ensures that only the picture you currently have selected is compressed.

No other images in your presentation are affected (hence why this is the default option).
By unselecting this option, you are telling PowerPoint to compress all of the photos within your presentation based on your selections.

This can save you a bunch of time if you know what you are doing, and you know that you want all of the photos in your slides compressed in this way.
BUT this can waste a bunch of time if you don’t know what you are doing.

How to compress images in microsoft powerpoint

Delete cropped areas of pictures:

This option affects whether or not PowerPoint keeps the cropped areas of your photos.

When you first crop a photo down, PowerPoint keeps the part that you crop (it just hides it from you). That’s why cropping an image doesn’t actually change the size in PowerPoint.

If you know that you do not want keep the cropped areas of your photos, you can decrease the overall size of your image by selecting the ‘Delete cropped areas of pictures’ compression option.

Just be warned, that once you delete the cropped areas you cannot undo them later. You’ll have to start over with the original photo. To learn how to crop a picture in PowerPoint (and all the options you have), read our guide here.

3. Choose your image Resolution

How to compress images in microsoft powerpoint

Higher resolutions like HD 330 ppi (pixels per inch) equate to the highest quality photo with larger file sizes.

Lower resolutions like email 96 ppi (pixels per inch) equate to lower quality photos that can appear grainy on large overhead projectors, and thus smaller files sizes.

How to compress images in microsoft powerpoint

If your presentation is a live event, such as a Ted talk, or if it will be run on a large HD monitor, then you’ll want the highest resolution photos as possible throughout your slide creation process.

If you are simply emailing a presentation to a colleague to view ONLY on their laptop (it will never be presented on a large overhead screen) then you can get away with a much lower resolution.

Either way, test your presentation before you run it. To learn all the different ways you can test run a PowerPoint slide show, read our guide here.

4. Double-check your selections and click ok

How to compress images in microsoft powerpoint

Before you click okay, this is your chance to double-check your selections to make sure you get the compression results you want.

I again recommend working through your images one-by-one and compressing them, rather than applying the changes to all of the images within your presentation.

Compress Images as a PDF

  1. Hit F12 for the Save As dialog box
  2. Change your Save as type to the PDF format
  3. Click Save

The reason why this works so well, is the PDF file format automatically compresses images for you (and removes other media that could be influencing your file size).

That said, you do lose a lot of native PowerPoint functionality in the PDF format, so I would only recommend doing this if you are distributing your slide as PDF handouts.

To learn everything you need to know about the PowerPoint to PDF conversion process, see our guide here.

Conclusion

Compressing images in PowerPoint is one to dramatically reduce your overall file size so that you can more easily share your presentation with other people.

That said, I only recommend compressing your images if you really need to.
If you are using a USB drive to share your presentation or you are just running your presentation from your own computer, there is no need to go through the hassle of compressing everything.

If you enjoyed this tutorial and want to learn more about our online training courses and other PowerPoint tutorials, visit us here.

Many PowerPoint users have noticed that when their presentation is opened in the Slideshow mode, the images in the presentation look blurry. The most common reason to see blurry images is that one has used a very small image in their presentation and expanded or scaled it to a larger size. In cases like this, blurry images cannot be avoided.

There are cases when one uses good-quality images in their presentation and the images look fine initially. However, the next time one opens PowerPoint, the same images look blurry. Potential causes for this issue are :

  • By default, Powerpoint compresses the images in the file every time you save it. Yes! you read it right.
  • This can also happen when someone editing the presentation has the option set to change the resolution of the images.

In this article, let us discuss different ways to fix the blurry images in the Powerpoint.

Table of Contents

Fix 1: Disable the Do not compress images

Step 1: Open the PowerPoint Presentation file

Step 2: Click on the File tab

How to compress images in microsoft powerpoint

Step 3: Click on More and then click on Options

How to compress images in microsoft powerpoint

Step 4: PowerPoint Options window that opens.

Step 5: From the left-hand side, click on Advanced

Step 6: Scroll down to the Image Size and Quality section

Step 7: Tick on Do not compress images in the file option

Step 8: Finally, click the OK button

How to compress images in microsoft powerpoint

NOTE: This setting will be applicable only for the current file. In case, you open a new PPT file, Powerpoint will continue to compress the images.

Fix 2: Enable compression with Good resolution

Step 1: Open the PowerPoint Options window. (Refer Steps 1-6 from the previous fix)

Step 2: Click on Advanced from the left-hand side

Step 3: Scroll down to the Image Size and Quality section

Step 4: Make sure Do not compress images in the file option is not ticked.

Step 5: From the Default resolution dro-down, choose High Fidelity or a larger PPI value. The larger the PPI, the better is the resolution of the image.

How to compress images in microsoft powerpoint

NOTE: This setting will be applicable only to the current file.

Fix 3: Disable Compression for all the PPT files using Registry Editor

Step 1: Open the Run window by pressing the buttons Win Key+r from your keyboard

Step 2: Type regedit and press OK

How to compress images in microsoft powerpoint

Step 3: In the User Account Control window that opens asking for permissions, click on Yes

NOTE: Registry editing can have an adverse effect on the system even with the slightest mistake. It is advised to take the backup of the registry before proceeding. To take a backup, In the Registry Editor–> Go to File –> Export –> Save your Backup file.

Step 4: In the Registry Editor window, in the search bar at the top, copy-paste the following location

Note that 16.0 is the folder corresponding to Office 2016. This would change depending on your Office. For example, for Office 2015, the folder will be 15.0

Step 5: On the right-hand side, right-click and New> DWORD(32-bit) Value

How to compress images in microsoft powerpoint

Step 6: Name the newly created key as AutomaticPictureCompressionDefault

Step 7: Ensure the value is set to 0

We hope this article has been informative.

Thanks for Reading.

Anusha Pai is a Software Engineer having a long experience in IT industry and having a passion to write.

If you need to email your PowerPoint presentation to other people, it’s important to get the file size down. The greatest factor in any presentation’s size is its media. In this tutorial we’ll show you how to compress images in PowerPoint 2013. Why not follow along with our example?

First of all insert an image onto a slide. If your image is selected, you will see the Picture Tools tab appear in the ribbon, with the Format tab within it. If your image isn’t selected, you can select it just by clicking on it.

In the Adjust group, you will see the Compress Pictures command. Click that.

The Compress Pictures window that opens offers you several options that we will go through now.

  • Apply only to this picture – do you want the picture compression to apply to all images in your presentation or just the selected one?
  • Delete cropped areas of pictures – check this box to discard the cropped areas of your pictures.
  • Target output – you have three options here:
    • Print (220ppi) – the highest pixels per inch (ppi) means the highest quality.
    • Screen (150ppi) – as the ppi value reduces so does the image quality.
    • Email (96ppi) – the lowest ppi value gives the smallest file size, which is better for emailing.
    • Use document resolution – this is the resolution set in the Microsoft Office Backstage view. By default this is set to print or 220 ppi, but you can change this default picture resolution.

    PowerPoint 2013 Compress Pictures Test

    We ran a compression test by creating a presentation in PowerPoint 2013 and then inserted the Windows 7 sample pictures with one on each slide. The total file size of all the eight image was 5.56 MB. The size of the presentation before we compressed the images was 5.744 MB. After compressing the images at the different ppi settings (see above), we got the file sizes down to the following:

    • Screen (150ppi) – 1.218 MB
    • Email (96ppi) – 0.420 MB.

    So you can see that both of the options above reduce the presentation’s file size significantly.

    In the next step, you need to select the necessary settings and proceed to compress your image.

    Download

    And finally, when everything is ready, you can download the file to your device and check it.

    What is PowerPoint

    PowerPoint is a program that is used to create presentations. It is included in Microsoft Office and is very popular these days. The application is relevant for business, advertising, teaching and lecture activities. It is actively used by schoolchildren and students. The program is great for public speaking and is an effective teaching tool. For many users, it has become an integral part of home and work computers. PowerPoint Presentation or Microsoft PowerPoint is a program for creating and delivering presentations. Here you can quickly and easily create bright, visual presentations decorated with pictures, tables, drawings, etc. It is used by teachers, students and schoolchildren with pleasure. After all, learning the program is not difficult, all you need is a little experience in Microsoft Word.

    How PowerPoint compression works

    PowerPoint is now a service that provides tremendous opportunities for creating and viewing slideshow-style presentations. It works with Microsoft Windows, macOS, Android and IOS operating systems. PowerPoint presentations are often quite heavy, making them difficult to transfer over the network and use on slower PCs and laptops. However, not many people know that the size of almost any presentation can be reduced at least several times. The PPTX format was implemented by Microsoft in Office 2007, but until now, either out of habit or for some other reason, users save presentations in outdated PPT. Saving (or converting) to pptx can significantly reduce the file size.