Preview Image Gamma At Different Values; Optimize An Image For The Web - Adobe Photoshop CS6 User Manual

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Save For Web & Devices dialog box (Photoshop version)
A. Display options B. Toolbox C. Optimize pop-up menu D. Color Table pop-up menu E. Animation controls (Photoshop only) F. Zoom text
box G. Preview In Browser menu H. Original image I. Optimized image
Preview images in the dialog box
Click a tab at the top of the image area to select a display option:
Original Displays the image with no optimization.
Optimized Displays image with the current optimization settings applied.
2-Up Displays two versions of the image side by side.
4-Up Displays four versions of the image side by side.
Navigate in the dialog box
If the entire artwork is not visible in the Save For Web & Devices dialog box, you can use the Hand tool to bring another area into view. Use the
Zoom tool to magnify or reduce the view.
Select the Hand tool (or hold down the spacebar), and drag in the view area to pan over the image.
Select the Zoom tool
, and click in a view to zoom in; hold down Alt (Windows) or Option (Mac OS), and click in a view to zoom out.
You can also type a magnification percentage or choose one at the bottom of the dialog box.
View optimized image information and download time
The annotation area below each image in the Save For Web & Devices dialog box provides optimization information. The annotation for the
original image shows the file name and file size. The annotation for the optimized image shows the current optimization options, the size of the
optimized file, and the estimated download time using the selected modem speed. You can choose a modem speed in the Preview pop-up menu.

Preview image gamma at different values

The gamma value of a computer monitor affects how light or dark an image looks in a web browser. In Photoshop, you can preview how your
images will look on systems with different gamma values and make gamma adjustments to the image to compensate. Activating a preview option
does not affect final image output.
Choose one of the following options by using the Save for Web/ & Devices dialog box Preview pop-up menu
Monitor Color Makes no adjustments to image gamma. Monitor Color is the default setting.
Legacy Macintosh (No Color Management) Simulates the default gamma of 1.8 used by Mac OS 10.5 and earlier.
Windows (No Color Management) Simulates the default gamma of 2.2 used by Windows and Mac OS 10.6 and later.
Use Document Profile Adjusts the gamma to match any attached document color profile in a color-managed document.

Optimize an image for the web

1. Choose File > Save For Web & Devices.
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