Opens after you place a connector on a drawing, unless you have selected the Place Partner OPC in Stockpile option on the Placement tab of the Options dialog. The Set Stockpile Location of Partner OPC dialog allows you to select the drawing stockpile and also the stockpile into which the partner of the new connector is placed.
Plant Hierarchy
Displays the hierarchical tree representation of the plant. When you select a node, the drawings associated with that node appear in the Drawing list area.
Drawing list
Displays all the drawings associated with the selected node on the Plant Hierarchy tree. Choose a stockpile from this view to associate the partner connector with.