Wall opening endcap styles are endcap conditions assigned to a wall end adjacent to a door, window, or door and window assembly. An opening endcap style has no independent geometry, but must use a wall endcap style as its geometry definition.
Like a wall endcap style, an opening endcap style must be assigned to a wall style.
In an opening endcap style, you have to define the endcap condition between the wall and the opening separately for each direction: jamb start, jamb end, sill, and head.