To manually crop a picture in Microsoft Word, Excel, or PowerPoint, select it, and in the Picture Format tab on the ribbon, click the top half of the split "Crop" button.

There are a few different ways to crop a video on Android, like picking from a preset list of ratios or dragging a selection ...

You can resize an image on your iPhone with the crop tool or a third-party app like Image Size. Here's how to do both.