Enable tabs or windows in Teams so that you can open more than a single file at the same time
Microsoft Teams is far too limited to single-use - you can't have more than one file from Teams open at the same time. Of course, you can open Teams in a or several tabs in your browser, but hat is just a work-around. Also, you sometimes need to be able to look at files or information in one Team and work in another Team. That isn't possible today, wiothout any workarounds.