working with multiple files

There was a feature in Musescore 3 I would love to see return.

I often work, as others likely do, on multiple scores simultaneously. Sometimes I do arrangements by "borrowing" (cut/paste) sections from different pieces. In Musescore 3, all the score score were accessible via a row of tabs. Now, to access another file, one has to physical move the top file out of the way on the screen - very cumbersome. Even a menu that show a list of accessible files would help. Thanks.

Bruce