I don't have the option of dimension properties Creo 7.0.10.0

Hello, I would like you to help me with the following question, I have already reviewed the blog and the PTC community, however I cannot find a solution. I am trying to convert this dimension into an inspection dimension. Likewise, I have to use the properties of this dimension, I right clicked and this appears, only this option, (see picture) I'm using 7.10.0.
I have seen on another blog that it is necessary to unlock it but I do not have that option, if someone can help me it would be of great. It toke a lot of my time.


