Rudi,
It works fine on my computer. I am running Guide 9.0 (27 July 2015 version) under Windows 10. When I click wider or narrower, the lines change in thickness for the five styles available. I then click one of the styles and I get a line of the thickness and style that I chose. You must click a style for the thickness to change even if it is the same style already being displayed.
Regards,
Tom
--------------------------------------------------------
Tom Kunsitis - Richmond, Virginia USA
> May I ask you a question in this context ?
>
> Are you able to change the STYLE of your lines (Ecliptic, Horizon, etc
> and Overlays).
>
> I do not mean the "COLOR" button, but the "STYLES" button / small
> window. Within the styles window, you have two options: you can change
> the FORM of the lines ("straight through" or "dotted") and the
> THICKNESS of the lines. While I am still able to change the FORM of the
> line (e.g. dotted), I do not seem to be able to change the THICKNESS
> anymore.
>
> I mean, I can ask Guide to change it and the window shows the thicker /
> thinner line, but nothing happens, resp. the changes are not saved.
>
> I am quite sure that this worked in former versions of Guide, as I had
> set the horizon line to a rather thick line and now I can't revert
> back. (A workaround is to load "factory settings" and then put
> indivually back all the tweaks you had made to your personal map, ...
> but this is a bit annoying).
>
> I just wanted to know whether this possibility has been removed
> (perhaps with the recent "overlay update"), or whether I have a
> corruption somewhere in my Gudie folder.
>
> Regards
>
> Rudi