>One thing I have noticed (and which I mention in case it aids diagnosis)
>is that the isotopes toggle does do something: If I go to (for example)
>M42 at level 6, it toggles a few nebulae (yellow squares) on and off --
>their labels stay there and the squares toggle off as isophotes toggle
>on, and vice versa. (e.g. LBN 956; S 278).
>
>Anyone else have any bright ideas?
>--
>Stephen Tonkin

No, but I want to add a bit here. Those big yellow squares are a
nuisance to me but I cannot get rid of them. The isophotes switch has
*no* effect on them on my computer, but some of them go off if I switch
off nebulae. I don't *want* to switch off nebulae! I don't understand
what they are meant to do, because I cannot see the point of having big
yellow squares all over the sky. I *did* once manage to switch them
off, but successive versions of Guide do not keep the same settings, so
I forgot all over again.

Over to you Bill ;-)

Lawrence Harris