Here is exactly what I do ("Hide unassigned tags" is activated): 1. click on a notebook => only tags used in this notebook are shown 2. select a tag => all other tags disappear 3. click again on the selected notebook => nothing happens In the Windows version after step 3 all tags used in this notebook are shown again (like after step 1), because the selected tag becomes unselected. Do you know what I mean? It would be great if the Mac version works the same.