HID Remapper layers

This video explains the layers feature in HID Remapper that lets you have multiple sets of mappings for some keys or buttons and switch between them.
HID Remapper is a universal adapter for USB input devices.
For more information, take a look at the project's GitHub repository:
github.com/jfedor2/hid-remapper

[@cheeseynz]

This is amazing. I can think of so many uses for this, such as creating new function key shortcuts for my 75% layout keyboard. I always forget the shortcut key combinations as defined by the keyboard manufacturer. Is it possible, for example, to map multiple keys such as "Fn + U" to an input?
Another use case is for the Nintendo Switch Online controllers - e.g. N64 NSO controllers which only work for NSO N64 emulated games and limited other games like Mario Kart 8. However, many of the buttons do not function at all for standard games. Therefore, using layers I could preserve the NSO native functionality for Switch Online games, and have a button + dpad combination set to activate another layer that's used to emulate a Switch Pro controller. Would that be right?

[@jfedor]

Typically the Fn key is handled internally by the keyboard and it doesn't actually send any inputs to the host, but you could map some other combination.
As for Switch, HID Remapper can emulate a fixed set of devices, one of them is a regular Switch controller, specifically the Horipad, not the Pro controller.

[@cheeseynz]

@@jfedor Is it possible to map a key/button combination to activate a layer then? E.g. Start + Y = Layer 1