How can I add a shortcut to zoom in/out with the plus/minus keys on the keypad?
I know about desktop-keymap.json, but I’m missing a list of the valid “command”s.
Commands are scattered in many places inside joplin source code. Have look at joplin.commands | Joplin Plugin API Documentation
As for zoom in/out, it’s unfortunately not implemented via commands, see joplin/packages/app-desktop/gui/MenuBar.tsx at dev · laurent22/joplin · GitHub , lines 870-88
You might want to check out this plugin:
I haven’t tried it but description looks like what you’re looking for.