How to edit images in a gallery widget?

A gallery widget can contain a number of images. You can add, edit and remove images from a gallery using the gallery widget's edit mode.

First, get into gallery widget edit mode. Next, click on images. Finally, hover over the images and click the pencil icon.

Here is how to edit images in a gallery widget:

Step 1: First, hover over the gallery widget and click the pencil icon. (How do I enter a gallery widget's edit mode?)
Step 2: Click the images button (A).
Here you can edit the images just like any other image and manage the images of the gallery itself.

Step 3: Hover over the image and click the pencil icon (B).
After, you will see the following screen which allows you to edit the image.