#### 15.4.8.1 Customizing Toolkit Behavior

The specific behavior of the backend toolkit may be modified using the following utility functions. Note: Not all functions apply to every graphics toolkit.

[prog, args] = gnuplot_binary ()
[old_prog, old_args] = gnuplot_binary (new_prog)
[old_prog, old_args] = gnuplot_binary (new_prog, arg1, …)

  Query or set the name of the program invoked by the plot command when the graphics toolkit is set to `"gnuplot"`.

  Additional arguments to pass to the external plotting program may also be given. The default value is `"gnuplot"` with no additional arguments. See Installation.

  See also: graphics_toolkit.