Hi Paul and thank you for your advice. My idea behind that is the following:
I need a main menu , and a submenu for registered users. The submenu should be shown as second row in an other colour. At first I tried to do that with a second menu, as described here (creating second top menu). https://www.joomshaper.com/documentation/helix-framework/helixultimate/faq-how-to-do
The problem was, that I was not able to integrate that cleverly in offcanvas mode - only as second offcanvas menu. Because of that my idea was to create a simple submenu (with 12 cols) as megamenu and set it to be always be shown.
Maybe there is another good way to do this?
Best regards and thanks in advance,
Christopher