Hi, I've made a powerpoint presentation in color which includes some graphs.  
I'm using powerpoint 2007.  The background I used is blue with white text.  
When I go to print in black and white, most of the slides look fine, but the
graphs are missing their axis.   All that shows up is the actual bars on the
bar graph, not the scale or the axis explaining what the bars represent.  
It's as if the computer didn't know that it was supposed to convert these to
black and so instead left them white on a white background.  Any way to get
around this?  Thanks!