Is there a way to ensure that the ratsnet, or what remains of it after having done a partial routing, can be printed on a page like tracks and other objects of the PCB ?
The reason is that some of the connections will be made by wrapping, and I need to document this.
OK, at this point, it seems that one solution would be to take a screenshot of the PCB view after enlarging the remaining ratsnet lines to make them more visible. Since the black background color of the PCB view is not ideal for printing, is it possible to change it to white, and how?
You can change the color of the ratsnest in the Appearance Manager on the right side of the PCB editor. It’s in the Objects tab page. You can also set the width of the ratsnest lines with PCB Editor / Preferences / Preferences / PCB Editor / Editing Options / Ratsnest / Ratsnest line thickness.
But in general, I agree with betrand_meneroud. The ratsnest is not intended as a “documentation guide” or to be printed. DRC will complain about “missing connections” if you attempt to use the ratsnest in this way. Adding more copper layers to the board setup and then using those extra layers to document your “wire bridges” seems a better approach.
I had already changed the ratsnest line thickness, and for printing, I understand that its seems not possible to obtain from KidCad a WYSIWYG mode, as well as the ability to change the background color. So screen shot plus The Gimp could be the solution.