If you'd like to add an image gallery to an article, start by clicking on the "Add Content" button on the right side of the Dashboard (see below).
Then, in the "Insert Content" box, click on the "Image Gallery" button and "Insert."
A box will open where you can upload the images you'd like to appear in your gallery. If you click on one of the image blocks (highlighted below), you can upload your image.
You can add as many images as you want!
When you have added all of your images, click "Save." You will be able to scroll through your gallery using the arrows to the left and right of each image!