Yes, you can hide all the 0-9 keys. And add rad/degree buttons. And set whatever functions/settings you can have elsewhere in the UI as buttons. And add or remo

Yes, you can hide all the 0-9 keys. And add rad/degree buttons. And set whatever functions/settings you can have elsewhere in the UI as buttons. And add or remove columns/rows from the "keypad". The upper-left button in the custom keypad will always be to edit the custom keypad itself, otherwise it's fully modifiable by the user.