The Crop tool lets you crop an image. It works like any crop tool you’ve ever encountered: Simply choose your area and crop it out.
I know this is a basic tool, but you’ll find yourself using this just as often as any other tool in Photoshop, especially when you’ve completed your graphic and need to clean up some of the free space around the edges.
To use the Crop tool
Select the icon indicated in the screenshot from the side menu bar, and drag the box over the area you would like to crop. To adjust the crop box, simply click and drag the small anchor boxes on the sides and corners of the crop box.
You can make your canvas size larger than it needs to be so that you can give yourself more room to move your design elements, and crop it down to the proper size afterwards.