Microsoft PowerPoint 2003
Optimize picture images to make your presentation file smaller in PowerPoint
High quality images are great for PowerPoint presentations but they tend to make file sizes huge. You can mitigate this, as well as save disk space and reduce download time, by using the Compress Pictures tool. This tool, which is found on PowerPoint's Picture toolbar, is designed to reduce color format with no loss to overall picture quality.
Note: If you do not see the Picture toolbar, point to View, then point to Toolbars, and then click Picture.