dvgt is an interactive TeX page previewer.  The program allows you to
look at TeX-generated DVI files on a variety of commonly available VDUs.
This is the short help file, "immed.hlp", called if no arguments are given.
The options help file, "options.hlp", gives more information.

USAGE:
  dvgt  filename[.dvi]
        [-H x_offset]  [-V y_offset]  [-d dummy_pk]  [-e dummy_tfm]
        [-f pk_directory]  [-h helpfile]  [-i]  [-l]
        [-m magnification]  [-p ps_prefix]  [-r resolution]
        [-t tfm_directory]  [-v vdu] [-x paperwd]  [-y paperht]

-H horizontal_offset   (default = 0.0 in)
-V vertical_offset     (default = 0.0 in)
-l   (set landscape mode, instead of the default portrait mode)
-m magnification   (default= DVI file's intrinsic magnification)
-v vdu   (default value = value of TERM)   where  vdu  may be one of:

   aed512 gigi kermit ncsatel regis tek4010 vis240 vis241 vis500 vis550
   vis603 vis630 vk100 vt100 vt100132 vt102 vt125 vt200 vt220 vt240 vt640

The other parameters' default values are system dependent.
Try "dvgt -f", for example, to find the current default font directory.
