Diameter: Specifies the diameter of the pipe. If connections cannot be maintained, a warning message displays.
Offset: Specifies the vertical elevation of the pipe relative to the current level. You can enter an offset value or select from a list of remembered offset values.
/: Locks/unlocks the elevation for the segment. When locked, the elevation of the segment is maintained and connections cannot be made to segments at a different elevation.
Apply: Applies the current Options Bar settings. When specifying an Offset to draw vertical pipe in a plan view, clicking Apply creates the vertical piping between the original Offset elevation and the setting being applied.