When you drag and drop or copy and paste an image into your PowerPoint presentation, Impress only makes a symbolic link to the image file on your hard drive instead of making a hard copy of the actual image. This is good for keeping the size of the ppt file small but becomes disastrous if you transfer your ppt file to another computer for viewing. In the latter case, your presentation will show up with its images missing and replaced by red crosses that indicate broken links!

Click on article to read more…