title: how to make stacked bar graph readable in white and black only
body: <p>I have a stacked bar graph to include in my paper, which is going to be printed by reviewers in black and white only. When I print it out, I cannot tell the difference between some parts of it, which would otherwise be clearly distinguishable in color. Is there any way to make it readable even in black and white? Thanks in advance.</p>
  
  <p><img src="https://i.stack.imgur.com/MKvCe.jpg" alt="stacked bar"></p>