I have it in the "On-Screen View Options" toolbar.
But I have customised it to show this icon.
I see though that it is in the standard "Drafting Aids" toolbar.
Barry.
One of the forum moderators.
Versions 6.5 to 27
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11