In PowerPoint 2007, 2010, and 2013, go to Format tab> Size group> Crop. In many cases (such as a photo from a digital camera), the height will change to 7.5, just what you want to cover the slide. If you want the image to be the size of a typical slide, change the width to 10, with the Constrain Proportions check box checked.

In Adobe Photoshop, choose Image > Image Size. You can do this in PowerPoint, but you’ll have more options in an image editing program. The best solution is to create the images at lower resolution, but when you don’t have that choice, here are some options: Many people insert photographs taken at high resolution that are over 1 MB each. The number one cause of large presentations is large image files. The second message is that you should do everything you can to make your presentation file as small as possible.

The first message is: Always test your presentation on the computer that you’ll be presenting from.

The reason is usually that the the presentation has become huge and the laptop isn’t fast enough or doesn’t have enough memory to handle it. I can’t count the number of times I’ve seen someone work hard on an ambitious presentation, test it all out, copy it to a laptop, and then have it fail when presenting.

Powerpoint file size reducer olnine