Demo Ceiling

[artworx01]

Hi, I'm using Revit Architecture 2012 and tried to demo a ceiling but the grids wont show as hidden lines only the boundary. Can somebody tell me how to make the grids to show hidden lines as well? Should I create another surface pattern (2x4 ACT) just for demo ceiling, if i do, please tell me how to add the pattern using hidden lines. Thanks in advance.

[renogreen]

What I do is I have a 2x2 and 2x4 hidden line pattern that use for demo ceilings and I create a 2x2 and 2x4 demo ceiling type. If you want to message me your email address I'll send you the patterns.