I have a China Doll, I've heard they need to be trimmed, but I have no idea exactly where to trim. My grandma also has some apple trees that she would like to get trimmed, but neither my grandma, mom or I know how to. Any help?

Hi Heather,
Here's a link you should find helpful for pruning your apple trees. It a great site I've been using for a number of years.
Gardening Basics - Prune an Apple Tree

Cheers,
Frann