Advance/Rewind Playhead 1 frame at a time

Greetings,

I see that the Num +/- and F9/F7 will advance/rewind the Playhead position by 1 second. Is there a way to advance the Playhead by a single frame? this would be very useful in setting film markers and figuring out tempos.

Cheers

Oops. Found it. CMD + (Num)+