On Thu, 30 Oct 2014, Randy Kesselring wrote:
 I am trying to edit some of the plot commands as described in the 
 manual.  Specifically, I am trying to change the canvas size for 
 pngcairo from 640,480 (the default size) to 480,480 or some size 
 close to this.  When I make the changes as described in the manual 
 (at least, as I interpret the manual) either nothing happens or I 
 get dinging bells (which I am sure indicate some kind of error). 
 Any suggestions would be greatly appreciated. 
Please post a copy of a plot file modified as you describe. I think 
this is the best if not the only way to diagnose the problem.
If the plot file is very big (includes a lot of data) feel free to 
send it to me off-list.
Allin Cottrell