There is a dedicated page that explains how to upload and apply your own images in the Playground.
Here are a few solid icon resources that work great with Yuzu:
Know a cool site that should be added? Let us know — we love discovering new resources!
No, this feature is not available at the moment.
Some users have found it useful to convert their images into a custom font, especially if they want to place graphics using the text tool. Here are a few online services that let you do this:
These tools vary in complexity, but most let you assign images to specific characters and export them as TTF or OTF files you can use in Yuzu.