Hello
I am new to LibreCAD, but I have some experience with AutoCAD.
I have drawn a football field, but for some reason some lines are not showing up in print preview no mather what I do. I tried changing line width, line color, layer propperties, etc. I have no clue what to try next.
Print preview looks like this:

Canvas or the product should look like this (keep in mind that blue and purple lines are construction ones and are not intended to be printed:

Thanks for all your help.
Klemzy