Saving custom presets is a huge timesaver, just click the Save Filters Preset… button in the lower-right corner of the Side Panel.
However, for even more control, you can modify any saved preset. Just open up the Preset Panel and browse your User Presets.
From the pop-up menu on a user preset you can choose:
• Update with Current Settings – Update the selected preset with the new settings chosen in the Side Panel.
• Delete – Removes the current User Preset.
• Rename… – Changes the name for the selected User Preset.
• Show in Finder – Reveals the individual preset in the Finder or Windows Explorer so it can be backed up or shared.
• Export… – Allows you to save (and rename) a preset in a new location