If you select an User Interface control you can move it to a new location in two ways:
- through Arrange >> Control Coordinates you can set the new (X, Y) position
- moving it of a predefined offset every time you press one of the keyboard arrows, or of one pixel (SHIFT + arrow)
Using the arrows is an easy way if you want to move the control of a little quantity, but it's difficult if you need for example 200 or more pixels.
Moreover with Arrange >> Control Coordinates you can set the new location for a group of selected controls using the "All" buttons.
But if you want to move a group of controls of a desired offset you can only use the arrows.
I suggest the implementation of specifying either an absolute position or an offset throug the Control Coordinates window, both for a single control and for a group of them.