Yong: How to use super key for shortcut?

[miltonx]

I am using yong 18.0.51 on fossapup64_9.5. Since the default switch key ctrl _ space clashes with some Gnumeric hotkey, I configured it to use alt _ space, which works. However, I prefer to use super_space since the super key (maybe) has less chance to clash with other app's keybinds. I typed in SUPER_SPACE in the config window, didn't work. Is there a proper way to assign the super key?

[icake]

I tried and the quick key Super_SPACE does not work.
I then used the virtual keyboard option under yong and searched all the available virtual keyboards. The "Super" key cannot be found anywhere. My guess is the "super" key is not included in the yong program and so it is not available as a quick key?

[miltonx]

I tried SUPER_L and MOD4. Neither works.