Hi Bertrand,

Unfortunately, I don't see a way to do that.

When you select object type 7, Guide assumes the object is to be
drawn as a galaxy, using whatever color has been set for galaxies in
the Data Shown box, with a solid line. You _can_ do something such
as

C00ff00;s2;e0,0,32;

This would cause Guide to set a pure-green color, with a dashed
line style, and to draw a circle centered on the object of radius
32 units. But it would be a _circle_, not an ellipse, and wouldn't
be scaled to the object's size (and obviously, being a circle, it
would not be rotated to the object's orientation.)

I can see that there might be cases, though, where one would
like to define a "galaxy symbol" that wouldn't simply track the symbol
used everywhere else for galaxies... for example, if you had a
separate dataset of galaxies that were "special" in some way. I
don't see a way to do it right off, but will keep the idea in mind.

-- Bill