To Mask a Reference
- To define the reference clipping mask's position, place a fence place a fence over the desired clip area.
- In the References dialog's list box, select the references to be masked.
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Click the Mask Reference icon.

The Set Reference Clip Mask settings window opens.
- Turn on Use References Dialog List.
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Enter a data point to accept the clip mask.
Note: More than one clipping mask can be specified for a reference.