Measurements at "Ride Height" to include tie rod assembly lengths and ride Hight as measured per the Manual! Or if you like.
The bottom of the adjusting blade to level surface as one measurement and the lowest point of the knuckle Arm to surface as the other! Subtract the lesser from higher and generally is 1/8 inch as specified
If not record that offset to return it to were it currently is!
I use Jack stands as tie points for strings from front to back. A level floor is a must to set toe! Google the process!