Here is a quick tutorial on how to make a clipping mask. This is something that gets used a lot when you are designing. please let me know if this was helpful. https://www.youtube.com/watch?v=SVQuy4YHWUw&feature=youtu.be
When I first saw this, I thought you just grabbed a video off of youtube and posted it, but then I saw the desktop screetshop topic you made, and saw that it really was you Keep the tutorials coming, might help someone learn something new