I have several mail accoints placed in separate folders. When I usually write the email I always need to choose the account that I intend to write FROM by clicking the small arrow near the Compose button. Just becouse if I click on Compose button itself it's going to compose message with DEFAULT FROM address. 

Would be great
- to make default compose address swithcable by position of the folder selector (where I am standidng in). 
OR 
- just compose it with the FROM Address taken form the current standing folder 

BTW!!! There are 3 options in Preferences -> Compose -> Writing: 
when replying
when forwarding 
when editing 

it would be logical to see there "when compose" option, to resolve the issue described above. 

Thank you guys for creating great mail client!