To Manipulate the Fence Contents

Place a fence.
Select an element manipulation tool that can be used with the fence contents.
In the Tool Settings window, turn on Use Fence and set the Fence Selection Mode.
You are prompted, usually for a data point. For example, with the Delete Fence Contents tool, you are prompted to "Accept/Reject Fence Contents."
Enter a data point to accept the manipulation or Reset.
In some cases, you can repeat the manipulation.
Note: You can Reset to halt a fence manipulation that is in progress. Manipulations that were completed before Resetting remain in the design and can be undone. (Pressing <Ctrl+C> also halts a fence manipulation.)