Layout Accessory Labels

I am at the point that I want to put labels above the push buttons on the front of my layout that briefly describe what the button does (the front of the layout is vertical if that helps). I am not sure how to label the three buttons that control the #164 Log Loader. The functions are dump the logs from the car, run the motor that lifts the logs up the loader, and dump the logs onto a waiting car. I am not sure these are the best labels but I was thinking of:

1. Dump (to dump the logs from the car)
2. Load (to run the motor that lifts the logs up the loader)
3. Unload (to unload the logs into a waiting car)

Are these the "appropriate" labels? I could rationalize that Dump and Unload could be swapped and still make sense. Load could also be labeled On or Run.

btw: I am probably going to use the same labels for the #97 Coal Elevator.

Any suggestions would be appreciated.

Thanks!