Q. I was removing an ugly ceramic tile backsplash in my kitchen. Some of the drywall paper came off with the old glue. It looks horrible. A home center employee told me I have to put in new drywall.

Luckily, fixing drywall doesn’t always require professional expertise—just the right tools and some patience. It's easier than you'd think to learn how to repair drywall, do a patch job on holes of ...