What I did while in NETCO, i was among the project team on Okan GGCP Bottlenecking project on line sizing and Amukpe Storage tank project on Demolitions and Modifications with the use of AutoCAD in design. During the project, the PROCESS INSTRUMENTATION DIAGRAMS (P&IDs) I was asked to use Revision Cloud and Hatch to identify the area of concentration. And to delete some ruptured pipes in the facility, this is done on the demolition list and the replaced pipe was shown on the modification sheet, the pipes may be of different diameters all this are visible on modification sheet, the drawings were sent back me after the project manager's review, reason because the hatched spaces were not the same, then i have to look af it closely, then work on the hatch as requested to match with the client's. I worked on it and all was ok, it went through inter diciplinary check and was approved.