Tabs in 2016R4.1

I read that tabs were working, so I thought I would use them.

I want to keep a tab on a method I am editing, while I have another tab on the window where the method is.

No matter what I try, the tab, even locked, reverts to the window.

How can I do what I described ?

Right-click on the window and open it in a new, locked tab. Manually create a new tab and navigate to your method. The first tab will stay fixed on the Window whereas the second tab will be “fluid”.

Or did I misunderstand?

For some reason, I did not get how to do it.

Now I understand.