Thought I'd test since we're both on Macs in case it is something weird not happening on Windows...
I'm having no problems at all using the settings you show, David.
Link's settings are problematic as lines are over-ridden to a white pen at his step 4 which renders them invisible on a page, or a white-background screen.
Do a cmd-A to select everything in your demo view. If the lines do not appear, then they really are not there.
The only way I can get them to not appear is to have them be tagged as 'new' elements... but you clicked on a SINGLE problematic drafting line (do not select more than one line to check this), and verified either in the Reno palette or the settings dialog that you see the bulldozer/demo icon for sure?
One of the forum moderators
AC 28 USA and earlier • macOS Sonoma 14.7.1, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB