If you are not familiar with view range this image can help to set the options above.
Roof plan view range revit.
In a floor plan view the key parameters are cut plane and bottom.
However exceptions to this are floors ramps stairs and any component that is hosted by a floor.
In plan view adjust cut plane and bottom values.
The view range settings are linked to three horizontal planes that control the visibility and display of objects in a plan view top cut plane and bottom as well as an additional plane called view depth.
Floor plans are an essential part of any revit project.
Read it if you need more information.
The view range dialog looks complicated but most of the time what you need to set is simple.
Go to the floor plan view and click in the view range menu in the instance properties.
For example if you are in the level 2 plan view of a multi story building and you select level 4 as the top revit keeps level 4 as the top even if you add levels between level 2 and level 4.
This image was snipped from revit help about view range.
Set a level and a height offset for each of these parameter.
In the view range dialog levels used to define the visible range are absolute to the current level of the view.
A reflected ceiling plan includes the cut plane as part of the primary range but it is typically positioned above the cut plane of a plan view.
Everything cut by the pink line like in the image below will display in thick lines.
About the view range.
View range settings apply to plan views and reflected ceiling plans model elements outside are the view range are not normally shown.
Video describing the revit view range settings for plan views.
Changing the view range is not always applicable.
Cut planes in a reflected ceiling plan are often set above the head height of the doors and windows.
These items are shown even if they are slightly outside of the view range boundaries.