Great question. How many branches do you have right now? How many plants in what size grow space? Depends on growing style, experience, how much space you have, how long you intend to veg, how much enviro control you have, final pot size, and your end goal, total yield, bag appeal, quality, bud porn.When is a good time to top the new branches, if at all?
The shading is going to help the side branches stretch. In a few days the sides will be long enough you can tuck the fan leaves down between the branches to expose them to light. Or you could just wait a few days for the side to get bigger and clip off the fans maybe a couple every day. 6 of one, half dozen of another. It will give you better air circulation and make the plant look nicer.Also, when should I eliminate the monster leaves blocking the light from new growth?