Software & Apps MS Office Compress Images in PowerPoint By Wendy Russell Writer Former Lifewire writer Wendy Russell is an experienced teacher specializing in live communications, graphics design, and PowerPoint software. our editorial process Wendy Russell Updated February 07, 2020 Burst / Pexels MS Office Powerpoint Word Excel Outlook Tweet Share Email Reducing the file size in PowerPoint is always a good idea, particularly if your presentation is photo intense, such as in a digital photo album. Using many large photos in your presentation may cause your computer to become sluggish and possibly crash during your time in the spotlight. Photo compression quickly reduces the file size of one or all of your photos at the same time. Instructions in this article apply to PowerPoint 2019, 2016, 2013, 2010; PowerPoint for Office 365, and PowerPoint for Mac. Open the PowerPoint file containing pictures you want to compress and select the picture or pictures. Select Picture Tools Format. If you do not see the Format tab, make sure you have a picture selected. Select Compress Pictures in the Adjust group. The Compress Pictures dialog box opens. Place a check next to Apply only to this picture if you want to compress the selected picture or pictures. If you clear this checkbox, all images in the presentation are compressed. Place a check next to Delete cropped areas of pictures if you want cropped areas to be deleted. Choose a Resolution. In most cases, choosing Email (96 dpi) is the best selection. Unless you plan to print out quality photos of your slides, this option reduces the file size by the greatest margin. There is little difference in the screen output of a slide at 150 or 96 dpi. Select OK to compress the selected image(s). You're done!