In this video tutorial, viewers learn how to cover screws and nails with drywall mud during drywall installation. Users will need a taping knife tool. Apply the drywall mud over the screw or nails and use the taping knife to flatten the mud over the screw or nail. Use the knife to take off any excess mud. Apply 2-3 layers of drywall mud over the screw, depending on how long the screw head is. This video will benefit those viewers who are in the construction trades or doing home renovation and would like to learn how to cover screw or nails while installing drywall to prevent any extra work of sanding and create a beautiful, flat wall.