Letting a Shih Tzu's Hair Grow Out?

I have a Shih Tzu and he is 4 months old. I want to grow his fur out, but the fur on his face is too short to tie and it's like sticking out in front of his eyes. Is there a way that I could put anything in it to at least hold it down? Kinda like how people would use a hairspray or gel to hold their hair to a certain style.

By Angel L.