~/.jwmrc-tray
in <Tray x="0" y="0" height="18" layer="3"> change nr. of layer
I haven't tested this at all as I prefer it the way it is by default, but think it should work.
BTW, autohide would also be an option for tray.
Load watcher.tcz and restart jwm
This works OK. I had tried altering the layer value previously but without success. I used values of 0, 1 and 2 assuming that they started counting from the uppermost layer and I wanted the tray to be as "uppermost" as possible. Using a value of 5 works fine.
Loaded watcher and swallowed to the tray and that also works OK. I would prefer it to occupy less horizontal area. I wonder if it is possible to configure it to display only CPU rather than simultaneously CPU, memory and swap?
There is also in the TC3 repository
volumeicon.tcz which also does what I want when it is swallowed to the tray.
So if I can find out how to reduce the area of watcher and find a way to display network activity it will be a good result.