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Blur That JPEG And Shrink It Down
Here’s a cool tip for when you’re creating JPEG images. This tip doesn’t work for all images, but can really come in handy for others. The tip is this: Because of the way JPEG compression works, if you can slightly blur your image, the file size will be smaller. You could just add a Gaussian Blur, or you could blur the image directly from the Save for Web dialog by entering a number in the Blur field. However, you’re usually better off putting a selection around the important areas of your image, then inverting the selection (by choosing Inverse from the Select menu) and blurring just the background. That way, the important parts stay sharp, and the noncritical areas become more compressed.
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Create A Composite Layer
If you have a multilayer composition and you
want to apply an effect to all the layers at once, don’t flatten the layers–use a composite layer instead. Hide the layers you want excluded, and press Shift-Command-Option-E (PC: Shift-Ctrl-Alt-E). A new layer will be created at the top containing a merged copy of all the visible layers.
Another option is to create a new layer at the top of the stack and make it active. Command-click (PC: Ctrl-click) each layer you want to include to make those layers active, as well. Press Option-Command-E (PC: Alt-Ctrl-E).
by Colin Smith
