Go to settings in your account. You first click your name. Then scroll down to settings. You can then set your zaps.

siggy47

I just followed your instruction and zapped something to you. Thanks man.

 press and hold the lightning bolt to zap custom amount, or change it in settings

btcEnthusiast

I want to zap you all the whole day but my whole 100 zap goes to one person at a time. How do I just it so that I can zap enough replies and comment I want to. Help a zapper out here.