There are various Fence Modes that can be used when defining a Fence to manipulate the contents selected in various manners.
The Fence (Selection) Mode determines just what constitutes the contents of a fence — that is, whether the elements (or parts of elements) inside, outside, or overlapping the fence are "contained" by the fence to be processed.
Fence selection modes. At left, a fence block and elements. At right, the fence contents in each Fence Selection Mode.
The Fence Selection Mode is a tool setting (labeled Fence Mode) for the fence tools in Drawing > Home > Selection > Fence Tools as well as for manipulation tools that can operate on fence contents. In the latter case, it is set with the option menu next to the Use Fence control. There is also a control in the Locks dialog.
Examples of Tool Settings window controls for setting the Fence Selection Mode.
Note: It is not necessary to place or recall a fence in order to set the Fence Selection Mode. Conversely, once a fence is placed, you can adjust the Fence Selection Mode to change the fence contents without moving or replacing the fence.