How to active "tolerance mode" in Creo?

I have designed a simple cylindrical shape in Creo. After that, I used the annotation tab to add dimensions and tolerances; however, I was able to add dimensions but when I try to add tolerance to that dimension , I have a case of "Tolerance Mode greyed out" as it appears in the attached screenshot "From my machine". How can I active the tolerance function?

One note, I have seen a video how to add dimension and tolerance, and the tolerance function at that video was active "From concurrent-engineering".

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