To upload multiple images into a gallery, click the gallery icon
and you will be prompted to upload images. Click "upload" and select all of the images you would like to feature in the gallery.
Once uploaded, you can re-order the images by dragging and dropping them in the appropriate order.
To delete an image in the gallery, hover over the green checkmark until it becomes a red "x". Click the red "x" and the image will be deleted.