set gxout graphics_type
Where graphics_type can be one of the following:
bar       
Bar chart (The library contains an example script demonstrating how to use gxout bar and errbar)barb      
Wind barbs contour   
Contour ploterrbar    
Error bars (The library contains an example script demonstrating how to use gxout bar and errbar)geotiff   
 (2.0.a5+) Generates a GeoTIFF format data file; options specified by set geotiffgrfill    
Shaded grid boxesfgrid     
Shaded grid boxes with values specified by 
set fgvalsfwrite    
Writes data to file instead of drawing a plot; options specified by set fwritegrid      
Grid boxes with printed valuesimap      
(2.0.a8+) Quickly drawn shaded grid boxes. No metafile, so no hard copy; image output only with outxwd.kml       
 (2.0.a5+) Generates a TIFF  image file and a KML  text file; options specified by set kmlline      
Line Graph linefill  
Color fill between two lines print     
Generates ascii output for anything displayed; controlled by
set prnoptsscatter   
Scatter plotshaded    
Shaded contour plot, alias for original algorithm (shade1)shade1    
(2.0.0+) Shaded contour plot, original  algorithmshade2    
(2.0.0+) Shaded contour plot, new algorithm, polygons merged to be larger and fewer in number (faster to render)shade2b   
(2.0.0+) Shaded contour plot, new algorithm, polygons all on sub-grid scale (slower to render)shp       
(2.0.a9+) Generates a shapefile; options specified by set shpstream    
Wind streamlines stat      
Prints statistical output to terminal instead of drawing a plotvector    
Wind vector arrowsFor station data, these additional graphics output types are also available:
findstn   
Finds nearest stationmodel     
Plots station modelstnmark   
Plots a mark at station location that is colorized by data valuetserbarb  
Time series of wind barbs at a point (1-D)tserwx    
Time series of weather symbols at a point (1-D)value     
Plots station valueswxsym     
Plots weather symbols at station, controlled by 
set wxopt
vector, stream, and barb, 
    the plotting routines need two result grids, where the first result grid is 
    treated as the U component, and the second result grid is treated as the V 
    component. These two result grids are provided with the display 
    command by entering two expressions separated by a semicolon:
     display u ; v
      display ave(u,t=1,t=10) ; ave(v,t=1,t=10) 
    
vector and stream, 
    you can specify a third result grid that will be used to colorize the vectors 
    or streamlines:
     display u ; v ; mag(u,v)
      display u ; v ; hcurl(u,v) 
    
 display const(u,0); u ; v  
    
wxsym, each value at a station 
    location is assumed to be a wx symbol code number. To see a chart of all available 
    wx symbols and their corresponding code numbers, run the sample script wxsym.gs. 
    
findstn requires three arguments to 
    be provided with the display command. The first argument 
    is a station data expression. The 2nd and 3rd arguments are the X and Y screen 
    coordinates of the of the desired search location. GrADS will find the station 
    closest to the specified X and Y position, and print its stid, lon, and lat. 
    This graphics output type should only be used when X and Y are the varying 
    dimensions and AFTER a regular display command (that results in graphics output) 
    is entered. 
    
stnmark, the size and style of 
    the mark are controled by set digsiz 
    and set cmark. To turn off 
    rainbow colorizing and use a single color instead, use set 
    ccolor color#.