2 Optionally, right-click (Windows) or Control-click (Mac OS) the hand image, and choose Display Performance > High Quality Display from the context menu that appears. This step isn’t necessary, but it lets you precisely preview the following steps. 3 With the hand image still selected, choose Object > Clipping Path > Options to open the Clipping Path dialog box. If necessary, move the Clipping Path dialog box so that you can see the image as you work. 4 Make sure that Preview is selected, and then choose Alpha Channel from the Type menu. The Alpha menu becomes available, listing the three alpha channels you saw in Photoshop by the names used in that application.
� Tip: You can
fine-tune the clipping path that InDesign creates from an alpha channel by adjusting the Threshold and Tolerance options, as you did in “Removing a white background using InDesign” earlier in this lesson. For alpha channels, start with a low Threshold value, such as 1.
5 In the Alpha menu, choose Alpha 1. InDesign creates a clipping path from the alpha channel. Then choose Alpha 2 from the same menu, and compare the results. 6 Choose Alpha 3 from the Alpha menu, and then select the Include Inside Edges option. Notice the changes in the image.
Adobe INDesign CS5 Classroom in a Book
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