Can you set the default colors for equipment inside AutoPLANT?
Change the color of the layer on which the equipment is placed. In Existing drawings, just adjust the color, for new drawings, look in pid-sup.lsp
look for line
(list "equip" 3 (At_GetLineType "CONTINUOUS") "_.PLINE" 0.04) ;2 Equipment
and change the 3 in the color code of your choice