the veil?

i wonder, when my dad walk me to the groom, my veil must be cover my face,right !

but my question is, my dad is the one who pull my veil to the back?

OR

my dad give my hand to the groom, then my bf and me exchange the vows, my bf pull my veil {the front part} to back, tyhen we KISS

i saw a lot of girl just keep the veil the way like that, didn't cover the face or whatever,

pls help