unlock column print styles in layer management

[PEGOLO]

Hello everyone,
I press that with autocad are a megaimbranate, at least for the moment.
in the layer management table I can not unlock column print styles.
I can't go to change the print color to allocate to the individual layers.
that settings I have to change. . ?
Thank you.

 

[PlannerRoad]

you are using a file model with color dependent print styles (ctb).
to use the print styles by name you have to use a stb model, in this case you activate that column.
if you want to convert the design you are using see the convertstilist command

 

[PEGOLO]

Thank you! very kind