volumes not visible in the plant

[fagioli.com]

Sorry but I don't remember or I don't understand how to act on an old file of 2009, in which I returned an existing building and on two sides of this I designed extruded volumes that represent adjacent buildings and that I categorized in the caeg. generic models with adjacent subcategory buildings.
Now, after a different time I reopened the file and I remember that in the plant I had made so that adjacent buildings were not visible while I left stand for the 3d. now I would like to see them in the plant, I go in graphic display options and see that adjacent buildings is regularly popped but I can not make them visible. I checked that the work phase in which I created those volumes was not in contrast with the display options of the work phases. Nothing.
in assonometry instead these volumes I see them straight. What's wrong?
Thanks for everything
Hi.

 

[fagioli.com]

I answer myself: I did not remember that after having dissected the volume and having clicked dynamic modification, re-checking the volume appears in the "properties" pane the option replacements visibility/graphic where I did not realize I had removed the spuns from view 3d in the plant - front/back - right/left
Sorry