Buttonbox leonardo keyboard

work, thank you very :))

yet, one question , how added new shortcuts to sketch ?

I have now
void setup() {
pinMode(2, INPUT_PULLUP);
Keyboard.begin();
}

void loop() {
if (digitalRead(2) == LOW)
Keyboard.press('R');
else
Keyboard.releaseAll();
}

between which the lines ? ex. shortcut "P" ??