XPRA menu - move or relocate, and display resizing

[markknit]

I'm using XPRA 4.3.4 on a large group of offline education servers running Ubuntu 18.04 with Nginx to host desktop applications through the browser. The setup uses an XPRA proxy server to launch the applications. However, when it's loaded there is a small menu bar in the upper left corner that interferes with access to the application controls. The users are very non-technical so getting them to move it each time won't work. Is there a way to automatically move it to another part of the display screen, or to remove it completely? I tried all of the menu related commands I could find, but none has worked.

I am also having trouble getting the display screen to scale properly to fit the browser window. I tried the scaling commands from the proxy server side, as well as the client side, but none seem to make any change. What is the best way to do this?

Thanks!

(BTW: I will eventually upgrade the systems to Ubuntu 24.04, but that will take a while due to the number of systems, so I need to stick with this level for now.)

[totaam]

I'm using XPRA 4.3.4

This is not a supported version:
https://github.com/Xpra-org/xpra/wiki/Versions

with Nginx to host desktop applications

Please share your nginx config.

there is a small menu bar in the upper left corner

In "Advanced options", there is an option for the "floating menu".

I tried all of the menu related commands I could find

Such as?
I don't know what "menu related commands" would be.

I am also having trouble getting the display screen to scale properly to fit the browser window

Don't use Debian or Ubuntu, this disability is well documented.