One keys send set of command.
eg: One key command for rectangle, circle, move, rotate
eg: One key send 0, 0, Enter for draw a 100x100 rectangle
eg: Right keyboard for numpad for rotate 45 degree
Macros - Send String
One key to send 30-40 character on BLE mode.
eg: Type your email: firstname.lastname@example.org and then enter.
eg: Type your phone number: +44 7828 046858 and the tab, save time to fill form.
eg: Type website address and then enter.
Record what I saw in Europe in 2013-2014.