* Measure both the vertical "rise" and horizontal "run" of the area and mark the dimensions along the corresponding edges of the panel.
    * Connect the marks with a T-square, hold down firmly, and score the drywall from point to point. Finish the cut using the "snap cut" method on page 40; be careful not to 
   damage the pointed ends.
    * Smooth rough edges with a drywall rasp. One or two passes with the rasp should be sufficient. To help fit a piece into a tight space, bevel the edge slightly toward the back of 
  the panel.