## MGED Environment Variables

DISPLAY
  DISPLAY specifies where to draw the windows.
BRLCAD_ROOT
  BRLCAD_ROOT specifies where to find the root directory of the installed BRL-CAD package.
EDITOR
  EDITOR specifies which external editor to use when one is required.
FB_FILE
  FB_FILE specifies the framebuffer to use when using applications that require a framebuffer.
TCL_LIBRARY
  TCL_LIBRARY specifies where to look for Tcl files.
TK_LIBRARY
  TK_LIBRARY specifies where to look for Tk files.