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Save for web slices always jpg7/4/2023 ![]() Selective: Like Perceptual, but better for Web work.Perceptual: Creates the reduced colour palette favouring colours that the human eye is more sensitive to.This is the drop-down box below the Image Format box. Some of the important optimisation options are discussed below. You can then fine-tune the optimisation to suit your needs. If you’re making a GIF, start off with a preset such as GIF 32 Dithered, which should work well for most GIFs. For a full tutorial on choosing the right image format, see Understanding image formats. As a basic rule, use JPEG’s for photos and GIF’s for everything else. There are three basic image formats in the presets – GIF, JPEG and PNG. Click the Settings: drop-down list (just below the Cancel button) to bring up the list of presets: There are a lot of options in the Save for Web dialog, and the choice can be quite bewildering! Luckily, there are a list of presets you can choose from to make it easier. You can also use the Hand tool top-left to move the view around (if the image is bigger than the view), the Zoom tool to zoom in and out of the image, and the Eyedropper tool to select a colour from the image, to be used by various colour options on the right of the dialog. The four tabs above the image view pane on the left allow you to view the original image, the optimised version (this is the default), the original and optimised versions side-by-side (“2-Up”) and the original, optimised and two variations on the optimisation all together (“4-Up”). You can select the file format to produce (GIF, JPEG or PNG), what size palette you’d like to use, how to cut down the colours to fit the chosen palette size, how much to dither the optimised image (if at all) and how much to sacrifice image quality to produce a smaller file size. This is where you tell Photoshop how you’d like to optimise your image for the Web.
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