A second opening dragged to the edge of the mat readjusts the outside size by adding the borders around the current openings.
Toggle to Dynamic Outsides On to change the outside dimension dynamically when openings are moved.
Toggle to Dynamic Outsides Off to keep the outside dimension a fixed dimension.
Dynamic Outsides
The Dynamic Outsides feature adds the Border Size to the Bounding Rectangleof the current design and adjusts the Outside Size as necessary, maintaining a consistent Border size while objects are moved or resized.