1. When going through the Effects Control panel, how can you determine when you have the Playhead on a keyframe? I use the arrow keys to move the Playhead one frame at a time, though it is difficult to tell.
2. When doing a scale up or scale down effect, do you always want to place a beginning and ending keyframe prior to doing any scaling?
There are Arrow (triangles) in the Effects Window along side key frameable parameters. These take you to next KF.
Set a first Hold Key frame at a point in the timeline at the exact point you want the next KF to begin its "action" from.
Keyframes are all about "TIME" as in ...when something occurs in time.