Adobe Photoshop CS3
Tips and Rules
This document offers general tips and rules for working with the Photoshop CS3 program.
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Save your file as a psd file before saving it as a gif or jpg. The psd is a Photoshop file and it preserves all the layers and colors used to create the original image.
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Save frequently to ensure that you do not lose any desired content in an image when you add or make modifications to it. Create a snapshot in the History palette, and when you have created or modified an image to your liking, preserve this image state and refer back to it. See Using the History Palette for more information.
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Layers can be used with an image in RGB, Grayscale, Lab, and CMYK mode.
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An image in Index mode will not work with filters and will not allow layering. It cannot be saved as a jpg.
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You can hide and make visible again selection lines by pressing [Ctrl]+[H]. If you wish to deselect an area, you can do so by pressing [Ctrl]+[D]. It is important to remember that if you hide the selection lines, the area is still selected.
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Photoshop is an excellent file conversion application. Tiff, bmp, eps, pict, and pcx files can all be converted to gif or jpg files using Photoshop.
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When scanning photos, be sure the pixels per inch (ppi) is set at 150. To learn more about image resolution and how to set the ppi of an image, see Adjusting Image Resolution.
