title: How to create 9 patch in Photoshop? What is 9.png encoding?
body: <p>Provided utility looks bad, for example it does not allow to do "Save As", or to draw several button states with similar slicing.</p>
  
  <p>Is it possible to draw 9.png in photoshop? I noticed, that generated png just contains black pixels in outer edge. Is this what is marking the slices?</p>
  
  <p>What if black pixels present in two opposite edges, how does this work?</p>
  
  <p>Are outer edges cut off when displayed on android?</p>