Understanding how to crop an image from the wordpress administration panel may not be an immediate thing. For this reason, I wrote this guide explaining with just a few easy steps how to do it.
First of all, if you’ve already uploaded the image, you need to log in to the administration panel, then choose from the left menu:
Media —> Library
After selecting the image you can click on the button:
You will notice that in the upper left of the image the crop key is disabled, you must first select the image portion by clicking the left mouse button on a point and dragging without releasing the mouse button.
When you have selected the portion of the image you can click on the crop button.
You will notice that the image has been resized and can be saved by clicking the save button.