To Rotate References by Using a Fence

Place a fence around the area containing the references to be rotated.
From the Model tab of the Project Explorer dialog, select a reference.
In the Reference toolbox, click the Rotate References tool.
In the tool settings window, choose a rotate Method (and key in X, Y, Z coordinates if Method is By Angle).
Turn on Use Fence and choose the fence mode.
Enter a data point about which the references are rotated.