When I press 3 the edges remain in 1...

[fiorenzo.fiorentino]

Hi guys, 

when I press 3 for the preview the edges and everything remain in 1... the object is smoothed but I see the edges in 1... sorry for the explanation but I don't know how to explain this. 

I attach some image I hope that could help.

The first images the object is in 1 in the second one the object is in 3 

[beratahmetaj02]

this might help - https://knowledge.autodesk.com/support/maya/learn-explore/caas/CloudHelp/cloudhelp/2019/ENU/Maya-Mod...