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Inside Photoshop
 
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  Saving
 
You can use Photoshop to save files in a number of different formats. In addition to Photoshop format (*.psd), you'll need to be familiar with TIFFs (*.tif), JPEGs (*.jpg), and GIFs (*.gif).
 
TIFFs are files that are very rich in data (color, resolution, etc.). Many scanners automatically save scans as TIFFs. For our purposes, you won't need TIFFs. They're too large and memory intensive; JPEGs and GIFs will work just fine.
 
JPEGs are a step below TIFFs in "richness." They are commonly used in PageMaker publications and on the Web and are good for saving images in which differences in color and brightness between adjacent pixels is slight. To save a Photoshop document as a JPEG, do the following:
  • choose File>Save A Copy.
  • In the Save dialogue box, name your image and be sure to select the JPEG option from the menu just below the filename (you CAN NOT simply type ".jpg" after the file name!).
  • When you click Save, one more dialogue box appears: JPEG Options. For the Quality option, it's a good idea to choose anything "5" and above.
  • Click OK to finish.
 
GIFs are used exclusively for Web graphics and are better than JPEGs for high-contrast images. To save an image as a GIF, you'll first need to change the color mode to Indexed Color; then you can save as a GIF. Here's how:
  • go to Image>Mode and choose Indexed Color.
  • You will be asked to flatten the layers. Choose OK.
  • The next dialogue box gives you a variety of options. It's often a good idea to accept the options Photoshop gives you; if you choose not to, the following settings will generally give you the highest-quality (and largest!) image possible:
    • Palette = Adaptive
    • Color Depth = 8 bits/pixel
    • Colors = 256
    • Dither = None
  • Click OK to finish.
  • choose File>Save As.
  • In the Save dialogue box, name your image and be sure to select the GIF option from the menu just below the filename (you CAN NOT simply type ".gif" after the file name!).
  • In the GIF Options box, choose either Normal or Interlaced (an interlaced image is one that gradually appears in a user's Web browser as it loads; a normal image remains blank until all of it is downloaded).