If you upload an image that is not the specified height and width, it's possible to crop the image that you have uploaded.
Step 1. To crop an image click on 'Crop Image'.
Step 2. Click on the crop-button.
Draw a square with the tool to make a selection. If you selected the area that you want to use, click on the green ✔ button. And click on 'save' to use it.
Awesome! You now know how to crop an image!