Tape down all paper before drafting on it. You cannot draft on paper that moves! Line up the top or bottom paper edge with the parallel bar first. If there are pre-printed lines (such as on a worksheet), line up a horizontal line with the parallel bar, and then tape down. When re-taping a partially-completed worksheet, line up a horizontal line again. Otherwise, the new lines won’t be parallel to the old lines. Tape the paper at all four corners so that loose corners don’t get caught under the bar.