[Stretching a picture (I've read the tutorials and still can't quite grasp it.)]

Thank you so much, it's so frustrating that something so simple takes me so long to figure out. You guys should accept bitcoin donations or something. I feel bad getting free advice.

[Stretching a picture (I've read the tutorials and still can't quite grasp it.)]

So far I have managed to scan the picture, rotate it and resize it. But when I go to stretch it, it stretches outside the checkered background. I'm a complete noob and would really appreciate some help.

Here are some imgur links to better display where I'm at and what my problem is. Thank you again.

http://imgur.com/IjvAbBx,ob1itcH#0