To the righthand side, you'll find a list of tools which includes the Vignette slider (and associated tools). To add a Vignette, simply just drag the slider left or right (right will give you a dark ...

When used correctly, a vignette can be used to guide the eye or add a subtle frame to a photo and the most common way to create one is digitally with the help of software such as Adobe Photoshop, and ...