On Thursday 25 April 2019 09:37:22 Uwe Brauer wrote:
>    > On Thursday 25 April 2019 02:31:57 Uwe Brauer wrote:
>    >
>    > Another thing that you can try is to right-click on the system tray
>    > itself and unlock panels. Somewhere there is a dialog that allows you
>    > to add an item to the system tray.
>
> But only the start icon.
> Maybe we have a misunderstanding here.
>
> Suppose I start tde-networkmanager, say from the command line, it then
> appears in the system tray, where I can access its configuration, that
> is to which wifi net I want to connect.
>
> I want the same for mathpix, I can start it, but it does not appear in
> the system tray, and that is why I can use it (via its shortcuts) but
> not configure it because I cannot access the configuration menu.
>
>    > You can add program, applet, whatever, but again, it takes some
>    > searching. However, I avoid touching my system tray once I have it set
>    > up - not even what I'm telling you now - because it invariably messes
>    > up everything, and takes for ever to get it back. All my icons are
>    > shifted round, etc., etc., etc. .... And once you get it set, lock the
>    > panels, and leave your tray alone!
>    >
>    > Also you can add a quick launch folder to the tray.
>    >
>    > If this doesn't work, then I must wonder if there is not some other
>    > issue.
>
> It does not
>
>    > Another oddity: I did a quick search using apt-get, and mathpix
>    > doesn't come up. I am running Devuan Jessie, so maybe it's just not in
>    > those repositories.
>
> It is not you have to install it via snap (so you have to install snap
> first)
> once you have installed snap, then
>
> sudo snap install mathpix-snipping-tool
>
> Will install it.
>
> Uwe

Okay, now I'm the one who needs help. 

I am not familiar with snap, but it's always good to learn new things. So I 
did install it, then tried the command that you gave me to install mathpix: 

sudo snap install mathpix-snipping-tool

And all I get are errors: 

ZOE ERROR (from /usr/lib/snap/snap): error opening file 
(/usr/share/snap/Zoe/HMM/install)
ZOE library version 2013-02-16

Bill