I currently use the signature functionality to provide letterhead stationary on a particular email account which include HTML formatting in the absence of template functionality.

On the Mac version it is possible to just start typing in the signature space, however on the IOS application you cannot type or edit in the signature block at all - It's either the signature you set in options, or none.

Would it be possible to improve compose window functionality to allow editing of a signature in IOS?

Cheers