Add tone or texture
Here’s where the boundaries of your taste come into play. It’s easy to go overboard when with a few simple swipes you can make your picture look like a moldy, selenium-toned tilt-shift. For more subtlety, tap on Center Focus and decrease edge brightness to add a slight vignette. Choose Vintage and pick a Style preset with a color tone you like, then dial down the Texture Strength to zero. Reduce the style strength, too—enough so that it’s just adding a subtle tint. Then decrease the Brightness to add a bit more drama.