Related: How to Use the Canva App: A Beginner's Guide Once you've cropped your photo to your liking, you can then use the Insert Picture tool to add it to your presentation.
You can use Microsoft's built-in Paint app for simple crops, or you can use free online tools, like Canva. Instead of cropping images in PowerPoint, you can use dedicated image editors. Although this is helpful if you want to undo the crop you made in the future, if you're final with the cut you made, this just adds to your presentation's file size. When you crop an image inside PowerPoint, the app will simply hide the part of the image you cut out. But if you do that, don't crop it using PowerPoint's built-in cropping tool. You may want to remove a section to make it more impactful. There are times when you don't have to use the entire image you just added.