Levels are finite horizontal planes that act as a reference for level-hosted elements, such as roofs, floors, and ceilings.
Create a level for each known story or other needed reference of the building (for example: first floor, top of wall, or bottom of foundation).
To add levels, you must be in a section or elevation view. When you add levels, you can create an associated plan view.
You can resize the extents of a level so that they do not display in certain views. See Datum Extents and Visibility.
You can hide level annotations after you add them. See About Hiding Elements in a View.
