I surprisingly noted that a Panel sent to back is still over the
wires.
I tried to use panels as background to contain objects, a kind of
Panel-Cluster area/zone, so that I can also write a description , or
instruction.
It keeps the project visually distributed in zones but with the wires
disappearing under the Panel makes it impossible to see the local
connections. I tried with line frames but the Panels are more flexible
( move-size-write-color...?:-).
If the Panel had a transparency setting it would be great. Possible...?