(Key Mode Toggle).
Next Frame moves the time slider ahead one frame.
If Key Mode is on, the time slider moves to the next keyframe. Keyframe options are set in the Key Steps group of the Time Configuration dialog.
If Time Configuration dialog Use TrackBar is on, Next Key jumps to the next key of any kind. If Use TrackBar is off, Next Key jumps to the next transform
key, ignoring any other type of keys.