OverKeys is an opensource tool that shows your keyboard and its layers right on your screen.
When you switch layers, the on-screen keyboard updates so you can see what each key does.
You can change colors and layout etc.
This makes learning and remembering layers much easier — no guessing, no memorizing.
Get the original version for Windows from Angelo Convento.
And get Moosy's config files for TailorKey
config: C:\Users\moosy\AppData\Roaming\Angelo Convento\OverKeys
executable: C:\Users\moosy\AppData\Local\Programs\OverKeys
Alexander Ryzhikov (Coobaha) created a macOS version, including a complete Glorious Engrammer configuration file.
Alexander added a new config type to his fork, specifically for split keyboards like Glove80, so the json config file is not compatible with Angelo's original version.
Coobaha on Discord
I spent a few evenings adding macOS support to Overkeys. Since it is written in Flutter, it wasn't that difficult, even though I don't have any experience with Flutter, Dart, macOS, or Swift. However, with LLMs, it turned out to be a fun project.
Source