23 Nov
                
                    2005
                
            
            
                23 Nov
                
                '05
                
            
            
            
        
    
                5:36 p.m.
            
        Quoting Alexandre Prokoudine <alexandre.prokoudine@...400...>:
The only common and recognizable way to show horizontal and vertical anything would be arrows.
That might not be a bad idea -- arrows communicate extra information: not only an axis, but a direction.
In principle folks should remember which way is positive and which way is negative, but in practice a little reminder would not hurt.
Especially if we are going to be fixing the coordinate system one of these days.
-mental