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This lesson demonstrates how to apply greyscale edge-masks - a selection of free greyscale edge-masks can be downloaded from Graphicsoft.about.com Here.
Link Here to learn how to design your own greyscale masks.
Undo and Navigation Steps
Two ways of undoing steps are from the top menu, Edit then Step Backwards. Alternatively, click a previous snapshot in the History Palette.
Navigate (zoom in and pan) your image using the Navigator Palette,
or the Zoom Tool. 
Activate The Hand Tool by tapping the Spacebar, keeping the Spacebar pressed, pan your image in the usual way. 
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After visiting the Graphicsoftabout.com website, download your choice of greyscale
edge-masks, and open one onto Photoshop’s workspace ready to utilise. You can download the swan image I am working with Here. My unzipping files lesson can be found Here.
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Because the edge image I am utilising is portrait size, and my swan photograph is landscape, we need to change the edge to landscape. Therefore, ensure the edge image is active, then from the top menu, choose, Image then choose Rotate Canvas then choose 90 CW (Anticlockwise).
 
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Now, activate the Move Tool and drag the edge image onto your photograph.
You now need to resize the edge image to fit the photograph, exactly. My lesson Here explains how. After you have resized the edge to fit the photograph, return to this
lesson.
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After resizing the edge to fit your photograph, your image and Layers palette will resemble the following.
 
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You now need to invert the mask’s colour, therefore, press the Ctrl key of the
keyboard, then tap the (keyboard’s) letter i. This inverts the black and white colours, rendering your mask as follows. Important! before proceeding, ensure the colours have been inverted and the centre is indeed black.
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From the Layers palette, working on the edge layer, change the Mode from Normal to Screen. Changing the Mode to Screen renders black pixels transparent. Your image should now have a white photographic edge, as shown below. Blend Modes Explained.
 
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When you have experimented with different greyscale masks, and you are happy with your result - from the top menu, choose Layer then choose Flatten Image. Your edge is complete and ready to save.
The photograph of Ben, (our cat), at the top of this lesson, was fine; however, to disguise his favourite hiding place, (his cherished cardboard box), I applied an
edge-mask, the photograph therefore focussed on Ben, and not his box.
Wendi E M Scarth. Top of Page - Home.
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