In PowerPoint, when there are multiple pictures inserted on a slide, their position and alignment matters a lot. Most of the time, pictures may be placed just randomly placed on the slide. In some cases, such a haphazard arrangement may work — but most of the time you will have to align objects in a proper way on your slide. Even before you align the pictures, you should explore whether all the pictures are the same size or not — we have already explained how you can resize pictures in our Resize, Rotate, and Flip Pictures tutorial.
Learn to align and distribute pictures in PowerPoint 2011 for Windows.

