Duties may include: Read blueprints or other specification to determine methods of installation. Measure and mark surfaces to lay out work, using tape measure and straight edges. Fit or fasten drywall into position. Measure and cut openings in drywall for electrical outlets, windows, vents, plumbing or other fixtures, using keyhole saws. Trim rough edges of drywall to maintain even joints, using knives & other related Drywaller activities as per SOC/OES 47-2081 (onetonline.org).