Once the full size drawing is complete, it must be transferred to the canvas or illustration board. I take my drawing in to a copy shop and have the drawing xeroxed in a blue-print copy machine, expanding the size of the final copy to the canvas size if needed. Transferring via a xerox copy preserves your original drawing. Using the xeroxed copy, place a carbon-copy type paper for art transfer under the xerox (do not use regular carbon copy paper as it is too permanent). Tape the drawing and copy paper in place and trace over the lines to transfer them onto the board. Be sure to check the first few lines you trace to make sure you are applying appropriate pressure.