http://auroratrek.com/

Above is a link to a site where a single person made 2 movies using Poser as the main render system. You can read his adventure about what it took. In Poser 11.1 they added the ability to TAG key frames with a color and a pop up Tool Tip when you hover over the TAGGED keys. See image below

And if you really need to see what is going on in a channel open the Graph Editor where you can see the Wave Form of the movement.

I use to say to put an identical Key Frame side by side to prevent the dreaded overshoot problem in Poser, but I have a better method in that where you want the movement to end place a Constant Key Frame. The channel will then stay at that value until you place another Key Frame. Normally I place another Spline Key Frame to get the nice curved movement and then end with a Constant. This gets rid of the feet sliding issue if you use IK then turn it off.

The reason placing a Constant Key is best is because it prevents Poser from seeing past that Constant Key to values before the Constant so Poser has to use the same value in whatever calculation it does to make the Spline Curve, which results in a CAPPED Spline that won't Over/Under shoot the Key you just placed.

I would REALLY Like it if the Poser Programmers would make a NEW KEY type that had a Constant on the Lower Side and a Spline on the Upper Side. The code to do it is already in Poser they would just need to make it call the graph functions with Constant on one side and Spline on the other.

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13