Adding text with a 'return' between.

Hey, I was wondering how you would go about adding more text to a label after it already has some. I currently have it doing this:

This is my first command.This is my second command.

How could I get it to do this:

This is my first command.
This is my second command.

Thanks, any help appreciated!

some thing like this ?

GUI.Label(new Rect(0,20,100,100), "This is my first command.

This is my second command.");

just use
for newline

This is my first command.
This is my second command.