How to Compress an Entire PowerPoint on a Mac Compressing your media files can save disk space and even improve playback performance. Also to be noted, if your file still exceeds 10 MB after compression, you may need to use a file sending service rather than simply sending them directly. If the file size is too large to upload to Google Docs or to send by email, try reducing the file size, following the steps below. These steps should work for PowerPoint 2007 and newer on a Mac or PC. (For older versions, use Google to search for how to reduce file size.) (1) Check the presentation’s current file size. (See steps below.).
Compressing Pictures With today’s cameras and phones that take mega-megapixel pictures, it’s easy to end up with huge files. When this happens, you might consider using the Compress Pictures feature to bring them to a more manageable size. You should know a few things about picture compression. First is that it’s on by default. Yes, PowerPoint automatically compresses your pictures when you save your file.
It uses a target pixels-per-inch resolution of 220, which gives an adequate balance of quality versus file size for most uses. Second is that you can still use Compress Pictures to compress more. Third is that after PowerPoint has compressed your images, it won’t compress them again at a higher resolution because that would cause your pictures to look really bad. Compress Pictures to Reduce File Size Apply picture compression according to how you intend to use your file. For example, if you need to email it, you might want to apply maximum compression. Select a picture on a slide. Ideally, use a presentation that includes a number of pictures.
![How To Shrink A File Size On Powerpoint For Mac How To Shrink A File Size On Powerpoint For Mac](http://digitalwriting101.net/wp-content/uploads/PPT-reduce-file-size.png)
Click the Compress Pictures button on the Picture Tools Format tab. This opens the Compress Pictures dialog box. To apply compression to all images in the file, uncheck Apply Only to This Picture.
Uncheck Delete Cropped Areas of Pictures if you want to leave the cropped areas available. Select the target output resolution, which will depend on how you intend to use the file. Select E-mail (96 ppi) for maximum compression.
Use Web (150 ppi) if you plan to post your presentation online or project it. Choose Print (220 ppi) if you intend to print. The HD option (330 ppi) is now available for high-definition displays. Some Options Aren’t Available If the picture has already been compressed, higher-resolution compression options may not be available. For example, if you’ve saved the file and left PowerPoint’s default 220 ppi compression setting selected, you won’t be able to compress the image again using 330 ppi (HD).
Many images you download from the Web will already be fairly compressed, so many of the higher-resolution compression options may not be available for them. Also, although PowerPoint will let you specify compression settings for CMYK images, they won’t actually compress at all. The option to Use Document Resolution refers to the resolution specified on the Slide Show tab in the Set Up Slide Show settings. Usually this resolution is the same as your computer screen, unless you consciously changed it. The biggest drawback here is you must remember to do this for every file. If you’re willing to edit your registry (or know someone who’s willing to do it for you), you can turn off automatic image compression for all PowerPoint files.
To learn how, see the instructions at. (Substitute 16.0 for 12.0 in the registry key listed.) After disabling image compression this way, you’ll have to use Compress Pictures any time you want to compress the file.
![File File](http://digitalwriting101.net/wp-content/uploads/PPT-reduce-file-size-options.png)
But at least that way you, not PowerPoint, choose when and how much it happens.