SEE EVERY TWEAK WITH BIGGER FILTER GALLERY PREVIEWS

Once you've chosen the Filter Gallery filters you want to apply, you'll probably want to spend some time tweaking their settings. If that's the case, you'd probably also like to have a bigger preview so you can really see the effects of each little tweak. You can do that by clicking on the up-facing triangle button, to the left of the OK button. This hides the center column (the list of filters) and expands the Preview column into its space, giving you a huge preview so you can see every tweak.