Position Keeper?

Help me please, I want to control (toggle) the Position Keeper with a keystroke; the mouse is awkward for me.

I've added or edited keystrokes for several SH4 features already. It's not difficult if one locates and edits the proper command in the Command file, which is located in data/cfg/command.

I've added keystrokes for Follow Sound Contact, Report Sound Contact, Depth Under Keel, Report Weather, toggle Radar views, On Radar, OFF Radar, Report Nearest Visual Contact, Radar Depth, Man the AA Guns and Deck Guns, Return to Course, toggle Battle Stations, view Attack Map, toggle TDC On/OFF.

The problem is I cannot find the correct command in the command file that operates the Position Keeper button. I have SH4 v1.5 and use Webster's GFO mod.

Please review this file and give me some suggestions.