Turn insert off during inspiration mode

Hello. During the time am trying to come up with a chord progresion i am pbviousky pressing keys. However i have a limited number of keys i can press because all the keys are automatically inserted on hookpad. Is there a way i can prevent the keys being inserted in the pad until i can come up with a chord progression i want? For now i have to delete all the chords i pressed from the pad and start again and its a real creativity blocker.