Please explain topping and crossing during veg. training

Title says it all. A bit confused on topping correctly also training plants. Thanks!!

Wait till the plant has six to eight sets of leaves, then snip off the new growth at the top. Simple.

Read away--> https://www.rollitup.org/advanced-marijuana-cultivation/151706-uncle-bens-topping-technique-get.html

Heres a few pics of a top and lst



Pictures say a thousand words.

maybe this will help you out m8
if it does you can hit me with a pl rep

keep em green

https://www.icmag.com/ic/showthread.php?p=2214345#post2214345