Hi,
It's an option against each individual fact and is found under the Fact Properties.
From the People/Person workspace right click on the fact that you want to add a description to and then select the fact properties. You should then see a radio button that will allow you to select either "Date/Place", "Date/Place/Description" or "Description only".
Alternatively you can select Edit/Manage Facts from the main toolbar, i.e. "File, Edit, View...", select the fact you're interested in and then click on the "Properties" button. You should then see the radio button option described above.
Regards,
Ian.
