After saving your bingo card, make sure you copy the URL; there is no other way to find your bingo card again.
Bingo cards cannot be edited after being saved; you will need to make a copy and update any links if you want to make changes.
You can use an image for a space by pasting a URL into the textbox instead of typing a label. For example, you can use the URL of an image uploaded to Discord: https://cdn.discordapp.com/attachments/788842607672950844/1013149667120398386/robot.jpg
Note: The middle space, also known as the "free space," will not be randomized for each viewer like the other spaces will.