Menuoption 'AF status in viewfinder?' (5D MK III)

[candyman]

I am going through the 'AF Setting Guidebook of the 5D MKIII'. Great document.
Reading about all AF-related menu functions on page 5, I noticed in AF5 the menu option 'AF status in viewfinder'.

Now, maybe this question was raised before, just couldn't find it. So sorry if I raise it again:

I checked my 5D MKIII menu and this menuoption is not visible. I have the other 4 options that this Guidebook is showing.

My firmware is 1.1.3

What other menuoption must be enabled for 'AF status in viewfinder' showing up in the AF5 menu?

[rj79in]

It is not there in my AF5 menu option also but is there on the 1DX. I guess Canon has mentioned this in error in the 5D3 AF guidebook - maybe they prepared this for the 1DX and this was copied in the 5D3 AF guidebook - who knows ...

This function provides an additional option for checking whether or not AF is working within the field of view. In the 5D3 you can only check this at the bottom right of the screen.

[candyman]

I see. Thanks.
This way of working is timesaving but can cause errors. I see this happening daily in ICT (coding and documentation) though I understand the reasons of working that way.