There are a few things you can do to add a vignette in Photoshop. The first is to select the layer you want to add the vignette to and then click on the Vignette button. Next, choose the type of vignette you want to create. There are many options, but some common options include: radial, linear, and circular. Once you have chosen your vignette type, click on the OK button to add it to your layer.
