Not sure I understand. You mean the System sidebar or the System menu?

I'm talking about the horizontal menu which starts with "article"

I still don't understand your request.

Like the first menu "save - save & close ...", make a second floating menu.

Do you mean like the options button?

You get lost quickly in the settings. Menu 2 should remain visible, as menu 1 also does. Here a photoshop montage to show you.

Simple answer is that it would probably be impossible.

The item you highlight as 1 is a single element so it can be given a position:sticky css

The item you highlight as 2 is not a single element

it's sad ... :( :)

Just noticed the screens in the graphic - nice ;)

This should be closed for the reasons stated above