Moving objects that are behind other objects in Storyboard
Control + Shift + Click on an object in Interface Builder to see a menu of all of the objects under the mouse.
From: https://stackoverflow.com/a/934152/1374512
Still no enough reputations to add comment, so I have to make a comment as an answer.
As @nvrtd mentioned, you can hold Ctrl + Shift and then click to show controls selection popup.
but as @David said, in that way you can only select rather than drag/move using mouse:
That doesn't work for me. I can select it, but can't move it.
my solution:
- select the control first
- move the control with keyboard arrow keys