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Lesson 16. Optimizing Web Images > Previewing transparency

Previewing transparency

Now you will preview the transparency in your browser. Because the ImageReady preview feature displays the image on a Web page with a white background, you’ll change the matte color of the image so that you can see the transparency.

1.
In the image window, select the optimized (right) version of the image.

2.
On the Optimize palette, make sure that the Transparency check box is selected.

Selecting Transparency converts areas in the original image with less than 50% opacity to background transparency in the optimized image.

3.
Click the Matte swatch in the Optimize palette to open the color picker, and then select any color except white. Click OK to close the color picker.

4.
Choose File > Preview In, and choose a Web browser from the submenu.

Note

To use the Preview In command, you must have a Web browser installed on your system.

If it is not already open, the browser first starts and then displays the optimized image in the upper left corner of the browser window. The browser also displays the pixel dimensions, file size, file format, and optimization settings for the image, along with the HTML code used to create the preview.

Transparency option selected

Transparency option deselected

5.
Quit your browser when you’re finished previewing the image.


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