The hypertext
feature is connected to the mousing
terminal option, i.e. use
set terminal canvas enhanced mousing
to see the labels on mouse over.
If you don't want the additional coordinate box, then you must just replace the line
<script type="text/javascript">gnuplot.init = function() {};</script>
in the html <header>
with
<script src="/absolute/path/to/js/gnuplot_mouse.js"></script>
of course with the correct path to the javascript file (see the path to gnuplot_common.js
).
As note: 4.7 is a development version with no patchlevel. Soon, the new stable version 5.0 will appear.