MARGIN_PERCENT
float topMargin = margins ? rint(MARGIN_PERCENT / 100.0 * verticalLines)
float bottomMargin = margins ? rint(MARGIN_PERCENT / 100.0 * verticalLines)
float leftMargin = margins ? rint(width * MARGIN_PERCENT / 100.0
float rightMargin = margins ? rint(width * MARGIN_PERCENT / 100.0