I seem to have a devil of a time with keyframes, no matter whether I'm using Vegas or Premiere Pro. I'm using MS 17 on W10 but don't edit often and tend to forget what I have done in such areas before. The manual is no help in this case.
If I remember correctly from previous versions, key frames can be used in an event, such as animating a graphic, which is my current self-assignment. But I can't find how to display the keyframe "subtrack", although keyframe is checked as being displayed already in video envelopes.