Now I see also, thank you T-Gergely!
first, I did mean ctl-left click.
second, the alt-left works for me.
and, knowing the alt-left, I see that under Tools / Preferences / Key Configuration using the System Default settings that alt-left/right are bound to Editor: Navigate Back/Forward.
I also notice the two buttons on my toolbar has those two Navigates bound to buttons!
I guess that I have finally woken up.
Again, thank you!