When sending a finished PowerPoint (PPT) Template file as an email attachment; Yes you need to compress the file. Many mail systems have a file attachment size limitation of 1 or 2 MegaBytes. A PowerPoint presentation without any digital images will usually be well under this size limitation; however, once you insert 5 or 6 images from your digital camera, that file can quickly grow to 3, 5, or even 15 MegaBytes in size. All of this depends of course on your camera's image quality and compressin settings at the time you took the photographs. This tutorial is not intended to teach you how to modify your camera settings. In fact, PowerPoint can compress your images for you; here's how:
NOTE: For the file you will use at a presentation in an auditorium, using an overhead projector, you may not want to compress your images, so I suggest maintaining two copies of the presentation. One copy for "print" and a second copy for "Web-Screen" viewing. So before following the instructions that follow, save this file with a new name; doing so preserves the original file, makes a copy with a new name, and opens that copy as the currently active file.
Open the PowerPoint file, single click on any image in the file; a picture tool bar may open.
Next, with your mouse pointer over the image, press the right mouse button (right click) and select "FORMAT PICTURE", as demonstrated in the included screen shot below...

click on the "COMPRESS" Button; found in the bottom left corner
of the dialog box.


For email or viewing on a computer screen, select Web/Screen.