Yosemite is a great place in winter.

Steps for creating this image:

1. Open a new workspace
2. Turn on the GRID and SNAP TO GRID
3. Add background image. Size and set transparency level to 40%.
4. Lock the background image in place.
5. Add the two top images.
6. Add borders and postion Note that border color was picked from the pictures using the eye dropper
7. Trim the workspace VIEW | WORKSPACE | TRIM