How to activate Audit Trail function on ABB Panel Builder 800 Version 6 ?

Hallo,

I have a problem, I should to display valves and motors on HMI on Audit Trail, but it doesn't work. I have selected the "Log to Audit Trail" in the Tag menu, but it still doesn't work. I have read in a manual "Logs operator actions on the tag. Only available if the Audit Trail function is activated in the project." My question is how to activate Audit Trail function? Have you any tips and suggestions?

Stjepan V.