Show Filter Mask Overlay

Since, in PSE, filter mask thumbnails don't appear in the Layers palette, we may not know which exactly parts are already masked and which are not.

To see the filter mask channel right in your image window, open the "Masks" dialog and apply the "Show FM Overlay" command.

In this mode, the mask channel is displayed as a 50% red overlay. This lets you scrutinize the mask and edit it more precisely (screenshot).

To hide the mask channel and see the image as it is, use the "Hide FM Overlay" command.