Tap anywhere on a key to enter the frequent character shown in the center of that key.
For a drag character, start anywhere on the key where that character appears and drag or slide to the direction indicated by that character.
For example, to enter A, tap anywhere on key A. Since the entire key is your target, it's easier to hit the right key!
To enter B, drag right a on the center key, since B is on the right side of the center key.
Or, drag down-right h on key A to enter V.
Or drag up-right b on key T to enter Y. You get the idea!
You don't have to stop at the key boundary for a drag. In fact we recommend that you make long, determined drags.
Please see Set Up to fine tune your preferred drag length.