I have a modal to add Activities,so the user can add all content by typing it and/or select files to attach.
My problem is: Maybe the user just wanna type a very long description and the textearea's height gonna be too small and the My documents Session will be useless. So I see two options:
The height of description textarea increase by its content but the SAVE button gonna be far away.
Description textarea with fixed height but with scrollbars that I think that is a bad approach for this situation.
I though to put a duplicated button 'add activity' near the description field but sounds weird to have multiple buttons to the same action so close.
What do you think that is a good solution for this case?