Make Sure Your Whites Are Really White

This tip is particularly helpful if you are scanning line art (such as a logo) to place into another document. Often, your scan might pick up an almost invisible gray tone in the white areas even though it appears white on your screen. With line art that is saved as a grayscale image or in bitmapped mode, it is very important that those white areas are indeed completely clear of any tone at all.

TRY IT To make sure your whites are really white, first select the Eyedropper tool from the toolbox and click the white area of your image. Next, choose Window | Info to display the Info palette. Look at the CMYK portion of your Info palette, where all the values should read 0. If they don't, your whites aren't pure.

IF

Navigator N Info \ (►)

R : 252 m G : 252 B : 253

C : 4X * M : 2X Y : 1 % K : 3X

, X : 3.444 ^ Y : 2.025

, W: ' H :

To change this, choose Image | Adjust | Levels. In the bottom-right corner of the Levels dialog box, there are three eyedroppers. Click the far-right eyedropper. Now click the area of your image that should be pure white (such as the background portion of a logo). The area that you click becomes your new white-point setting, or the whitest value in your image. Click OK when you are satisfied with your results.

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