To Scale References Selected by Using a Fence

Place a fence around the area containing the references to be scaled.
In the References dialog's list box , select a reference.
Click the Scale References icon.
In the tool settings window, choose the scaling Method (and key in the scale factor or ratio, if applicable).
Turn off Use References Dialog List.
Turn on Use Fence and choose the fence mode.
Enter a data point about which the references are scaled.