title: Convert an image to an iPhone toolbar icon
body: <p>I have a grayscale icon that I'm editing with Photoshop with a transparent background, but I can't, for the life of me, figure out how to convert the icon to one that can be used as an iPhone toolbar icon. If I simply save the image as a PNG, it doesn't show up as anti-aliased on the iPhone because every pixel with color is being rendered as black, instead of a shade of gray.</p>
  
  <p>According to the Apple docs and other sources, there needs to be an alpha channel on the image to specify varying levels of transparency for each pixel. However, I have no idea what that means. I've read these posts and docs from Adobe and I still can't figure out how to properly convert a grayscale image into one that can be used as an iPhone toolbar icon. The blog post is hard to comprehend and poorly written, and the Adobe docs don't really help.</p>
  
  <p><a href="http://cahit.hayalet.net/blog/514/converting-an-image-to-iphone-toolbar-icon/" rel="nofollow noreferrer">http://cahit.hayalet.net/blog/514/converting-an-image-to-iphone-toolbar-icon/</a></p>
  
  <p><a href="http://livedocs.adobe.com/en_US/Photoshop/10.0/help.html?content=WS74B356C9-353F-4483-8632-7B1A102F2A2E.html" rel="nofollow noreferrer">http://livedocs.adobe.com/en_US/Photoshop/10.0/help.html?content=WS74B356C9-353F-4483-8632-7B1A102F2A2E.html</a></p>
  
  <p>Can someone point me in the right direction or provide exact, step-by-step directions to doing this in Photoshop?</p>