You need to place them in a layer that you can turn off.
I have 2 layers for section lines - 'section lines - visible' and 'section lines - hidden'.
One always shows and the other is always hidden (unless I am working with it).
One of the forum moderators.
Versions 6.5 to 25
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision 3510 - i7 6820HQ @ 2.70GHz, 16GB RAM, AMD FirePro W5130M, Windows 10