I never use it as well. Only for a reference. I've always adjust all valves like below.
Valve Lash Adjustment
Starting at Number 1 cylinder, rotate the engine until the exhaust rocker just starts to open the exhaust valve. Set the valve lash on the intake rocker at this time. Continue rotating the assembly and stop when the intake rocker starts returning from full lift. Now the lash on the exhaust rocker can now be set. Continue this procedure for the remaining cylinders following the engine’s firing order.
If setting preload for Hydraulic lifters remove up and down play on pushrod then add ¼ to ½ turn of preload. Some people say tighten until you it gets hard to turn the pushrod then set preload I don’t agree with this method as the lifter may not be pumped up. JMO. If the motor was just running then yes this works.
This method works on almost any flat tappet engine