I see there are a couple posts about clean HDMI out, but none that has the same issues I have, as far as I can see.Canon G7X mark III purchased last year. Firmware version 1.3.2.In the Advanced User Guide page 179 it says that the SHOOT5 menu should ...
Worked it out, with the help of Canon locally! Camera needed to be in video mode (in stead of like AV, TV, etc.), which absolutely makes sense when I think of it, but it never hit me as a potential culprit. The menus change when in video mode.