set vrange2 v1 v2
When drawing a 2-D scatter plot using graphics output type
gxout scatter, this command specifies the range of values for the scale on the Y axis (from v1 to v2).
set vpage xmin xmax ymin ymax
This command defines a "virtual page" that fits within the specified
limits of the real page. All graphics output will be drawn into this
"virtual page" until another
set vpage command is entered. A
clear command clears the physical page (and any virtual pages
drawn on it).
The "real" page is an 8.5x11 page in the landscape or portrait orientation. The orientation is specified when you first startup grads. The graphics output window is a representation of the real page on your computer screen. The graphics window can be any size at all. You can set the dimensions explicitly (in pixel coordinates) using the set xsize command, or you can simply resize the graphics window using your mouse. When it comes time to print the contents of the graphics window to a real page, the screen coordinates (in pixels) will be scaled so the graphics will fit in the real page in the same way they fit in the graphics window.