keep it plain and simple

To do, express, or create something in a straightforward, uncomplicated, or unelaborate style or manner. A: "Do you have any tips for writing the application?" B: "Just try to keep it plain and simple. You're trying to highlight why you're the best candidate, not write an essay for college." I really don't like interior design that uses such wild, clashing colors. I much prefer to keep it plain and simple. The filmmakers didn't have the budget for fancy special effects, so they had to keep it plain and simple.