I can't be sure, but it might be because I explain this often... to a lot of shinki. So I've tried to be as clear as I can be.

Anyway, let's see - first, this is the hand position you need for all three of them. The oldest shinki call it a halberd position, but I think that only works if you know what a halberd is - it's a kind of spear, long and straight. So you hold your hand like this, and then you say 'Borderline' or at least 'Line' to activate the spell.