In Revit you create details by making a Callout over a particular area of the model. Typically a callout is created in a section or plan view.
The resulting callout view shows the 3D model as it appears in the view the callout came from.
DISPLAYING 3D MODEL ELEMENTS
Details must reflect the 3D model, in particular the setout of 3D model elements.
To ensure details match the 3D model they are describing, always keep the 3D model visible.
If you are completely redrawing the detail and not using any of the 3D model, use the view's Display Model parameter to show the 3D model as halftone.
Refer to GUIDELINES > DETAILING > DETAILING - DISPLAYING THE MODEL BACKGROUND on how to do this.
EDITING 3D MODEL ELEMENTS
It is important to remember that the background in a callout it is the actual 3D model.
If you move something (e.g. a floor) all of that 3D object will move across the whole project.
DO NOT MOVE MODEL OBJECTS IN A DETAIL (CALLOUT) VIEW.
If 3D model elements need editing it must be done in an appropriate view, typically a plan or section.
KEEPING THE MODEL ACCURATE
Sometimes working through a detail exposes problems with how 3D model elements are set out.
It is critical these problems are fixed as the 3D model is used for dimensioning and set-outs.
If you aren't confident you have the skills or project knowledge to make necessary changes to 3D model elements, make sure you communicate what needs to be changed to some-one who can do it, or make the project architect aware of the issue.
Project architects should consider establishing a protocol to be followed when people detailing come across problems with the 3D model.