Modeling Structure in Revit®: 2. Set Levels and Grids
“Set levels and grids? Just throw a few of them in the model and let’s do some real modellin’!”
Level as the most important element
Levels are the most important elements of a Revit model. Grids are important, but not so much as levels (you know, if you delete a grid, nothing will get deleted with it like when you delete a level).
Your whole future (re)modeling work depends on how you plan and set your levels in the beginning. Levels and grids are “the structure” of your Revit model. You don’t need to be a structural engineer to know the importance of a good structure. Here are some important tips about how to properly Read More

to open Element Visibility Settings dialog. There is an option called When cut in Plan/RCP. (RCP is short for Reflected Ceiling Plan)
Unfortunately, BIM still has no single, widely-accepted definition. Let’s think of it as “an intelligent simulation of architecture”.