I too find it difficult to navigate the Add Bookmark. The window to find the folder location is too small. I submitted a suggestion to enlarge the window or even better, make it expandable by the user. That way you can see more of the folder tree ...
Add-Bookmark: Location-Window is too small to navigate easily
I suggest increasing the size of the very small window to find the location of the folder when adding a new bookmark. If a user has a large number of folders and sub-folders, it can be ch...
