Animation timeline - go to next/prev key

I’m currently re-adjusting some animations via additive layers for bones in persona. However this has become a little hard as I’m unable to lock to frames or go to next/prev key. I’m moving the scrubber by hand so all my keys are in a sub-frame position. I’m unable to catch their positions and able to update. On each mistake I’m deleting most of the previous keys and losing time :frowning:

Is there any way to

  • lock key creation to frames, so they will not use sub-frames?
  • a shortcut for moving between keys so I can update them?