SLIDERS HELP
If  the total image is bigger that the window it is  possible  to 
move  about the drawing using the sliders and the arrows  but  if 
you zoom in and out a few times or alter the size of the model  a 
large part of the image will be blank and it is quite possible to 
get lost and not be able to find the drawn bit.  To overcome this 
you  can occasionally RESET SLIDERS which eliminates blank  areas 
not  in the window and this quickly allows you to find the  drawn 
area.






