To add images and such into your snippet library and then have them on your keyboard, you create new snippets. Here's a how:
1: Create a folder as you need to be an admin of a folder in order to add to it
2: Open folder
3: Click plus + in bottom right to add a snippet. You can choose from Text, Image, Video and PDF. With images, you CAN "mass upload" and select many images at one time to upload! But that is the only thing you can mass upload at this time.