Delete by swiping back following the curve of the keyboard.
Return by swiping forward following the curve of the keyboard.
Shift by swiping up in the direction perpendicular to the curve of the keyboard.
Caps Lock by swiping up in the direction perpendicular to the curve of the keyboard 2 times.
The ergonomic fan shape allows keys to be reached with a natural side-to-side motion of the thumb rather than an awkward in-and-out motion required by most other mobile keyboards.
With about a million known phrases, Thumbly is able to provide intelligent suggestions for the words you are about to type. Words are automatically corrected and new words can be learned by tapping the quoted (") suggestion.
A convenient toggle switch allows you to switch the keyboard into left and right handed modes.