All the answers I've been able to find are for LXDE but I need the answer for LXQT.
What command/DBus message opens the main menu? Clicking the existing entry in the Shortcut Keys utility only lets me enable/disable it, not modify the shortcut or see what command it runs.
Is there a way to see what command the existing entry runs? The documentation doesn't seem to have a configuration file location.
In Lubuntu 20.04, pressing the Super_L key, aka the left Meta or Windows key, launches the LXQt menu.
To change that, use Menu > Preferences > LXQt Settings > Shortcut Keys.
In the GUI that opens,
scroll to the item having the description Show/hide main menu. Select that line by left-clicking on it and then click on Modify near the top right.
Click in the box Shortcut box showing Super_L and type your preference. Then OK and close the GUI. You're done.
The answer does not allow you to change it to another modifier, though - the original binding is "special" as it is not possible to enter that in the UI. However one can use xmodmap to make any key into the Super_L key. For example, I have swapped the "Search" key (which acts as Super on my Chromebook) with the right Control key, so that I get Search acting as Control and the right Control key acting as the menu key.
There is no need to mess with window manager configurations, as this is simply a job for xmodmap. On lubuntu 21.10, I am able to do the following:
Create .config/autostart/xmodmap-autostart.desktop
[Desktop Entry]
Comment=xmodmap autostart
Exec=xmodmap $HOME/.config/xmodmap
Name=xmodmap-autostart
OnlyShowIn=LXQt
Type=Application
Version=1.0
and create .config/xmodmap
remove control = Control_R
remove mod4 = Super_L
keycode 133 = Control_R
keycode 105 = NoSymbol
add control = Control_R
keycode 105 = Super_L
add mod4 = Super_L
The trick is using NoSymbol as I am trying to swap right control with the super key, but you can't do it all at once.
