Adobe 13102498 User Guide - Page 460

PHOTOSHOP CS3 453 User Guide Note: To have Photoshop prompt you before saving an image with multiple layers, select Ask Before Saving Layered TIFF Files in the File Handling area of the Preferences dialog box. See also "TIFF" on page 466 "About file formats and compression" on page 459 Save a file in JPEG format You can use the Save As command to save CMYK, RGB, and grayscale images in JPEG format. JPEG compresses file size by selectively discarding data. Note: You can also save an image as one or more JPEG files using the Save For Web & Devices command. To quickly save a medium-quality JPEG, play the Save As JPEG Medium action on the file. You can access this action by choosing Production from the Actions palette menu. 1 Choose File > Save As, and choose JPEG from the Format menu. 2 In the JPEG Options dialog box, select the options you want, and click OK. Matte Offers matte color choices to simulate the appearance of background transparency in images that contain transparency. Image Options Specifies the image quality. Choose an option from the Quality menu, drag the Quality pop-up slider, or enter a value between 0 and 12 in the Quality text box. Format Options Specifies the format of your JPEG file. Baseline ("Standard") uses a format recognized by most web browsers. Baseline Optimized creates a file with optimized color and a slightly smaller file size. Progressive displays a series of increasingly detailed versions of the image (you specify how many) as it downloads. Note: Not all web browsers support optimized and Progressive JPEG images. Note: Some applications may not be able to read a CMYK file saved in JPEG format. In addition, if you find that a Java application can't read your JPEG file (in any color mode), try saving the file without a thumbnail preview. See also "About file formats and compression" on page 459 "JPEG format" on page 463 "Play an action on a file" on page 611 Save a file in PNG format You can use the Save As command to save RGB, Indexed Color, Grayscale, and Bitmap mode images in PNG format. Note: You can also save an image as one or more PNG files using the Save For Web & Devices command. 1 Choose File > Save As, and choose PNG from the Format menu. 2 Select an Interlace option: None Displays the image in a browser only when download is complete. Interlaced Displays low-resolution versions of the image in a browser as the file downloads. Interlacing makes download time seem shorter, but it also increases file size.