Add a Dark Edge Vignette Effect?

We add vignette effects in a completely different place from where we fix vignetting problems (see, if you don’t want a vignette, it’s a problem. But, if you add an even darker one, then suddenly, it’s cool). You do this in the Effects panel (in the Develop module’s right-side Panels area) by simply dragging the Post-Crop Vignetting Amount slider to the left (as I did above). If you want your edge darkening to extend farther in toward the center, just drag the Midpoint slider to the left (if you drag it to the right, it moves the darkening up into the corners and away from the center). Keep the Style set to Highlight Priority for the best look.