I trawled the internet seeking an explanation for a cable with crossed lined and eventually found the answer….try it yourself, it’s a rare commodity! When I discovered it’s meaning, I then back to QElectroTech and found the tab corresponding to the issue…after some clicking and unclicking of ticked boxes, I succeeded in adding two lines to the cable….

….no thanks to this forum or at least the far from helpful people responding to my query….one of which I believe to be a moderator….they don’t deserve the title having inadequate teaching skills….

This should tell you how QET works, so that the developers don't have to waste time replying to you. Enjoy!

https://qelectrotech.org/forum/viewforum.php?id=19

You've already found the option to make the conductor two-colored: take it one step further and try out the options in the other tabs of the conductor properties!

BTW:
Do you know this part of QET-Website?
https://download.qelectrotech.org/qet/m … index.html

I can’t paste a pic here, I’m clicking on the image icon and getting this  but no way to insert the image…

In the screenshot the view is "slightly" zoomed to two lamps and the mouse-pointer is hovering over a terminal. When the end of a terminal changes to a blue circle, you can click and drag to another terminal.

QElectroTech is not a drawing program that you use to draw lines: you create electrical connections between terminals or clamps.

So you pull a connection from one terminal of an element to a terminal of another element.

Of course, you need to have a QET file to do this!
Other formats are not (yet) supported!