Keyboard Shortcuts in the Simulator ??

M is for Menu. I tested real quick with the Input sample and it works on 935 (5-button watch, where long-pressing UP activates the menu) but not Vivoactive 3 (1-button watch, where long-pressing on the screen activates the menu).

For 935, pressing M in the sim is equivalent to clicking (and holding) on the UP button in the sim. (Both of those actions trigger KEY_MENU and ON_MENU in the Input sample's display.) I saw the same result with Vivoactive HR, where pressing M in the sim is the same as holding the button which opens the menu.

For Vivoactive 3, pressing M does nothing, but clicking (and holding) on the screen triggers ON_MENU (but not KEY_MENU).

So it seems that M for KEY_MENU works as long as there is a physical button where a short press or long press opens the menu. And it specifically doesn't work for touchscreen devices where long-pressing the screen opens the menu. (But those devices don't seem to support KEY_MENU anyway.)

Honestly, I don't think it makes sense that a (short) press of M should be equivalent to a long press of some device button in the sim, but it is what it is. (Almost no device has a literal menu button which opens the menu on a short press, except 630 IIRC).

[https://forums.garmin.com/developer/connect-iq/f/discussion/333202/where-is-the-map-from-keyboard-keys-to-watchui-key_]