set arrow <arrow number> from [ <system> ] <x>, [ <system> ] <y>, [ [ <system> ] <z> ] to [ <system> ] <x>, [ <system> ] <y>, [ [ <system> ] <z> ] [ with { <option> } ]
where <system> may take any of the values
( first | second | screen | graph | axis<number> )
The set arrow command is used to add arrows to graphs. The example
set arrow 1 from 0,0 to 1,1
would draw an arrow between the points (0,0)
(1,1)
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