CONVERT TO SMART FILTERS
Typically, when you use a filter in Photoshop, it is applied directly to the image layer, and therefore cannot be undone, or adjusted at a later stage. While you can use the Undo function, what happens if you use a filter, apply lots of other edits and then decide later that you don’t like the original filter? You'll be waving goodbye to all of those edits and will probably have to start again. This is where Smart Filters come in. With your image layer active in the Layers palette, go to Filter> Convert for Smart Filters. The thumbnail in the Layers palette will display an icon over it, but the big difference is that when you apply a filter it will now show underneath your image layer. And, by double- clicking on the filter in the Layers palette, you can adjust it at any time, or delete it altogether. You may notice that some of the filters aren’t available as Smart Filters, and will be greyed out. These include Vanishing Point, Lens Blur, Flame, Picture Frame and Tree.