How to top a plant

Ive never topped a plant. All my planys are 2 inches passed the 2nd node. How do I do this?

Step by step instructions would be appreciated. Thanks in advance.

Just pinch the top off. twist and pinch. works every time. no cutting involved.

F2H

Ok I appreciate the help.

How big does it have to be

How long before you can top again? & is twice per plant recommended?
Thanks