Dom 0 - Menu or Panel launcher : How To add an item there

Dear all,

it was easy in a standard linux distribution to add an item in the Menu or in the Panel but here in Qubes I did not found how to add one.
I am able to run some AppImage (Portfolio Performance, SuperSlicer, …) or Scripts from a terminal but I did not found how to add a launcher in the Dom0 Qubes menu or Dom0 Panel.

I well looked to a “Qube - Qube settings - Applications” but did not found there a way to add the concerned Qube menu item to add the desired (named here above) application downloaded in the concerned Qube.

Could someone tell me How To do this two things ?

Sincerely thank you and have a nice day.

DId you try to create desktop files in /usr/share/applications?