Here are a list of commands that affect the display.
cc (clear-command-center)
cg (clear-graphics)
clear-all (ca clearall)
clear-command-center (cc)
clear-graphics (cg)
clear-info (clearinfo)
clear-output (co)
clear-patches
clear-plot (clearplot)
clear-turtles (clearturtles) (ct)
clearall (ca) (clear-all)
clearinfo (clear-info)
clearplot (clear-plot)
clearturtles (clear-turtles ct)
co (clear-output)
ct (clear-turtles clearturtles)
inspect-patch
inspect-turtle
mouse-xcor
mouse-ycor
print
print-status
screen-half-width
screen-height
screen-width
show
view-plot