Emailing PowerPoint presentations can create problems with file too large error messages from your ISP, especially those that are graphic intensive. There is a way that you can compress the images in your presentation to help on the file size.
On the Pictures tab, click the Compress button to open the Compress Pictures dialog box (shown here).
Choose All Pictures in Document. Select Web if the presentation will be shown, Print if you want more compression. Then click OK.
Save the file to a different file name such as Texas_Seminar_Compressed.ppt.
Note: For versions of PowerPoint before 2007.