Ruler Y Axis

[Aaron Dalton <aaron daltons ca>]

My question is more of an aesthetic one.  Standard mathematical graphs 
*increase* X and Y values as you move up and to the right of the origin. 
 In Dia canvases, however, the Y values on the ruler *decrease* as you 
go up from 0,0.  Is this an intentional feature?  If so, I'd be 
interested to know what its purpose is.

I have just discovered Dia and am loving it.  Thank you for a great 
software package!

Aaron