title: Understanding 24 bit PNG generated with Photoshop
body: <p>A 24 bit .png file with transparency, as those that can be generated with <a href="http://en.wikipedia.org/wiki/Adobe_Photoshop" rel="nofollow noreferrer">Photoshop</a>, has really 24 bits distributed across each color plus the alpha ? or the 24 bit  refer only to the colors and ignores the alpha (RGBA 8888).</p>
  
  <p>Is there any tool to examine a PNG file and verify this kind of information? Does Photoshop have any options to verify or configure this?</p>