@ma Thanks a lot for the feedback.
I am not sure if we rally have that much space vertically. On my Xperia X the edit area, when the OSK is visible, is maybe 1/3 of the screen. And I hope to be able to add a second toolbar with formatting options in the future. So after playing around with this, I am more inclined to use the short toolbar in one row with the file name. The short toolbar would have the actions open, save and undo.
Although I agree, some other actions might be nice to have in quick access too. But making this configurable (one option) seems to be complicated to implement without loosing stability.
So which other actions woukd you like to have in quick access bar? I think of maybe have a fourth one, maybe depending on the available width or configurable. This would also depend on the general length of your file names. If one uses long file names, the toolbar might be inconvenient.