How to select background views in a storyboard or xib
One way is to use the jump bar at the top of the editor. It's the control that shows the path of objects leading to the current selection.
Another way is to press control+shift and left click (or shift right click) an item. That shows you all of the objects under the mouse in a menu, and allows you to disambiguate the one you meant to select.
The good news: Place your mouse on the overlapped images, press and hold shift and right click the mouse. You should see the list of objects, select your object in the back. You can resize as you wish.
The bad news: you can only use the cursor arrows if you want to move it!
Select the view from the menu on the left of interface builder.
