Blow-dry straight?

I may sound stupid 4 asking, but I was wondering... how do u blowdry ur hair straight (like w/ a round brush) b/c everytime i try 2 it gets tangled up or my hair ends up curling under (like majorly bad!!) and i look like a 5 yr old with a "cute" bob. My hair hits my colar bone (when straight) and i have a lot of chunky layers. Can u help me, any1?

Don't wrap your hair around the brush unless you are trying to flip the ends or something. Just use it like a normal brush to pull the hair taut. And hold the ends of the hair up a bit with the brush under the piece of hair while blow drying that spot to get straight ends.