In the export area dialog it is impossible to keep the proportions automatically. Even pressing shift, strg or alt while resizing the selection area doesn't work.
My feature request is to add a checkbox to the dialog to lock the proportions.
Lock proportions in "Export Area"
Moderator: Kyete
Re: Lock proportions in "Export Area"
Absolutely! I'll add it to our list. We're in testing for 1.0.6, but it'll be in 1.0.7.
-Katie
-Katie