I really don't get what all my buttons are for. Well I know what they do, after reading the manual, just not why I'd want to use them, different varieties of pa

I really don't get what all my buttons are for. Well I know what they do, after reading the manual, just not why I'd want to use them, different varieties of partial dishwashing? I'm a single person household and I have no problem waiting 2-3 days until I have enough for the full program. So I only ever press the same two ("full program", "ON"). And it really should be just one: ON.