I made a symbol and decal for silk screening the outline of an OLED display. The display is connected to the PCB with a ribbon to a connector on the back side of the board.
This outline needs to be perfectly centered as a guide for mounting in assembly. PADS (VX.2.4) integrated Part Editor is complaining "Part has no gate(s) defined." Its a lot easier to center a part than a 2D line drawing.