Unlock Rail

Is there a console command to unlock the rails so I can realign the mirrors? running grbl-lpc and C3D mini, win 10, K40 laser?

I found the command in the grbl wiki. $slp

And then you have to reset the board to get it to talk again, right?

I just unplug the laser from pc

Yes I have to reset the board. Right click on the word devices in lightburn.