You can use shape editing tools to manipulate the surfaces of your floor elements.
Create a floor in revit.
To sketch the profile of the floor click modify create floor boundary tab draw panel and select a sketching tool.
Once created select the floor element and then use the shape editing tools accordingly.
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This video was recorded using revit 2020.
Select walls in the drawing area to use as floor boundaries.
Remove all shape edits to your surfaces by means of the reset shape tool.
Open the section or elevation view to add levels to.
For type select a view type from the list or click edit type to modify an existing view type or create a new view type.
Create you floors in the normal manner first.
If it is not active click modify create floor boundary tab draw panel pick walls.
Select one or more levels for which you want to create a plan view.
Add a floor by picking walls to create the boundary.
As you place the cursor to create a level if the.
When performing the procedures you may notice minor differences in functionality and user interface.
Edit the floor boundary and use the align and trim tools to create a closed loop sketch.
On the ribbon click level.