modifier_key

The option documentation is properly formatted yet

Modifier Key

  • Default:
  • Example: modifier_key = key_lalt
  • Since: 2.7.3dev
  • Type: Choice

The modifier key is the key you use (in combination with other keys) to trigger shortcut functions in FS-UAE. What the default modifier key is depends on the operating system; Cmd on macOS and Alt on other systems.

  • key_lsuper (Cmd) on OS X.
  • key_lalt (Alt) on other operating systems.

This option be can be used to change the default modifier key to almost any other key.

Source: https://github.com/FrodeSolheim/fs-uae/blob/master/docs/options/modifier_key