When you try to add more than five slides with about four big pictures, your presentation file becomesbigger and bigger, and PowerPoint works slower and slower, wastes disk space needlessly, and hangssometimes. 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.

1. Compress Images In Powerpoint Mac
2. How To Compress Images In Powerpoint
3. Compress Images In Powerpoint Mac

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

To reduce resolution and compress images, do the following:

In PowerPoint 2003, select the image and choose Crop on the Picture toolbar. Compress the image. (n PowerPoint 2007, 2010, and 2013, go to Format tab Adjust group Compress Pictures, and click the Options button. In PowerPoint 2003, select any image to display the Picture toolbar. Click the Compress Pictures button. An image with more pixels than that, is wasted when it is displayed on your screen. Another valuable option to keep high-quality images in your presentation, is to check the option Do not compress images in file. Use these above methods to block PowerPoint compress images.

1. Select any picture, and the Picture Formattab appears:

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

1. Open your PowerPoint file. Select a slide that contains an image or picture. Select the image or picture. Click the Picture Format ribbon at the top of the screen. Click Compress Pictures. Select the checkbox to Delete cropped areas of pictures option to reduce the size of the image or picture in the presentation.
2. Luckily, you can change the picture compression settings to reduce the overall file size. Compressing pictures is especially helpful if you want to email a presentation. With the picture selected, click the Compress Pictures button on the Format tab.

3. In the Compress Pictures dialog box:

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 ofpictures checkbox. When this checkbox is unchecked, PowerPoint just hides the 'cropped'areas. Such “hiding” is good if you are planning to change cropped areas.

Compress Images In Powerpoint Mac

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 resolutiondefined 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:

How To Compress Images In Powerpoint

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

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

Compress Images In Powerpoint Mac

See also this tip in French:Comment compresser des images dans la présentation.