I document all my levers with (N)otes. I also do this with any other "machinery" or processes I set up, that might mystify me later. If I find myself using a certain lever a lot, I make a macro that does the job of creating the Pull task for me. Macros can have pretty long names, preventing me from abbreviating and then having to decipher what I meant later
This is probably a little advanced for the question at hand, but here is how I make lever macros.
- Make sure you have a hotkey bound to set your view to a specific location.
- Start recording a macro (default Ctrl+R).
- Press the hotkey to center the view somewhere.
- Press Q and move the cursor to the lever you want to activate, then press Shift+P to pull it (and R or whatever else is needed). Do this for all the levers you need to activate for the task.
- Stop recording the macro (default Ctrl+R).
- (Run the macro with Ctrl+P to make sure it works. Then remember to cancel any lever jobs it created.)
- Save the macro (default Ctrl+S) and type in a name for the task, such as "Start outer spike repeater", "Activate all entrance drawbridges", "Reset obsidian farm", etc.
- To load the macro later, use Ctrl+L to bring up the macro list, select the macro you want and press Enter, and press Ctrl+P to run it.
In my last fort I had one macro that I'd run when a siege came. It took care of setting the alerts and pulling three or four levers to start up the trap system. This worked very well, and I almost forgot where the levers were even located, sometimes. But, enough tantrums were happening (the fort was cursed) that the levers got destroyed every few months, and I had to rebuild them. The Notes I left for myself proved very handy so that I could replace the levers exactly where they were before, and then I didn't have to change my macros. Hooray for (N)otes!