my $full_length = Bio::SeqFeature::Generic->new(
                                                -start => 1,
                                                -end   => 300
                                               );


my $panel = Bio::Graphics::Panel->new(
                                      -length    => $length,
                                      -width     => 1000,
                                      -pad_left  => 10,
                                      -pad_right => 10,
                                     );

##</code><code>##

$panel->add_track($full_length,
                  -glyph   => 'arrow',
                  -tick    => 2,
                  -fgcolor => 'black',
                  -double  => 1,
                  -relative_coords => 1,
                  -relative_coords_offset => -300
                 );