Flags, and complete them!
When I flag an email, I would like to complete the task, and see the checkmark when I do so. Now the only option is, removing the flag.. By that I cannot see anymore if I finished the task. Please bring the checkmark back!
When I've completed reading an email, I would like to put a check there, rather than a flag automatically. Too many steps in getting to the checkmark option.
Chantal Visi commented
Categorizing my flags is very important.