Board Thread:Episode Discussions/@comment-1181222-20170823100207/@comment-734582-20170823132608

Ravenlot 27 wrote: I'm still going to cheer for it and for their mechanics to be explained properly. Seems that he marks something and can then control it if it's in his field of vision. With all his Sharingan, that's every conceivable angle. It's a subtlety that i didn't really get in the Manga, but the anime makes it fairly clear that he can use this power from any angle.

I guess it's similar to FTG and shadowclone: you seal a tiny portion of your chakra in an object and then simply control that chakra. For FTG it's a self-summon, for shadowclone