While creating PowerPoint slides, you will invariably add pictures — and of course you can also add pictures in Word documents or Excel sheets. If you are using any of these programs on a touch device such as Microsoft Surface, this process works just like how you would insert pictures on a desktop version of PowerPoint 2013. The differences between working within a desktop and a touch environment become a little more pronounced when you want to do something simple with your pictures — like cropping them. Yes, cropping can make your picture more pertinent by removing areas that may be not required. In this tutorial, we’ll show you how you can crop a picture within PowerPoint 2013 on a touch device such as Surface — the process works in the same way on Word and Excel versions of Office 2013.