Thanks Luc, this is exactly what I needed.
Is it possible to set the time so that the speed of playback is consistent with the number of ticks?
Animations are extremely speed-sensitive-- it makes a big difference if you feel like you are running through a space, or walking, or walking slowly. I’d like to be able to work through the animation in a way where the speed is stable, and I can just add to the end without affecting the playback speed of any other part of the animation. I feel frustrated because every time I add to the end of the animation (i.e. increase the number of tics, and move the blue slider) everything gets faster… unless I go back into options and increase the overall length of the animation in a ratio equivalent to the number of tics I just added. I hope this question is clear.