Caps lock, control and command

System settings → Customise modifier keys → Map caps lock to command
If you need anything more complex at the system level, karabiner looks like the right tool
These are my mappings as of March 2023:
- caps lock → command (for everything)
- leftmost key (control or function) → caps lock (same as linux/windows)
- second from left (function or control) → function/“globe”
- option (windows key location) → control (main key for the window manager because osx ignores it, position consistent with windows)
- command (alt key location) → option (with iterm2 sending alt hex codes) – on mac option+left/right/backspace/delete is almost always mapped to move/delete by one word and I haven't found a way of avoiding having to get used to this although karabiner-elements could probably do it
Install one of your saved keymaps for iterm2, to map most command combinations to control and some opt combinations to alt, plus to get sensible command/option+arrow key combinations working