How many switches have to be toggled on for activating Tolerance Group in drawing mode?

Tolerance Group is greyed out!
I have set Entity Display as "Show all tolerances" in Options. But it keeps going back to "Show only ISO table-driven tolerances".

I have set Tol_Display to be Yes. However, the tolerance group is still greyed out.

I don't have this type of problem with all my drawings in the past. But this time, this drawing is passed to me to help finish it. Is there another "switch" to be toggled on so that the tolerance group can be activated? Thanks.
There always have more to learn in CREO.

