Since the latest major update to Thunderbird, the 'Mark' button no longer functions as a button - it just brings up the dropdown menu. It used to do both; pressing the button would 'mark' the selected email (equivalent to the M keyboard shortcut), while you could also click to the side to get the dropdown menu. It's a minor change, but it's annoying: it means one now has to click twice to mark an email unread/read, rather than just once. This mounts up when you do it a lot. Please change it back to the previous functionality!
I too agree! I used the single-click MARK button to "mark as read" and "mark as unread" any email quickly as needed.
The previous release of Thunderbird behaved that way. MS Outlook behaves that way. Apple Mail on Mac behaves that way. (Yes I have to use all 3 email clients on both PC and Mac for my jobs, and it's a PITA when one is not standard like the others -- or has been standard until this latest Thunderbird release.)
Now it's actually 3 action sequences:
1) click the Mark button to expose the drop-down menu
2) move my mouse cursor to the option I need to use
3) then click the actual option I need to use
This Thunderbird release has changed what has been a standard paradigm and upset a user habit pattern and expectation that has been around for literally years!
As the OP said: "This mounts up when you do it a lot. Please change it back to the previous functionality!"
I agree. I'd like it to act as a toggle - If the message is read the "Mark" button would mark it as read. If the message is not read then the "Mark" button would mark it as read. Or have additional buttons for these individual actions.