Details views as plans and sections can be created in Revit, and are called Callouts.
BEFORE YOU START
Open a view that shows the area where you want to create the detail.
Under View tab select Callout, then Rectangle (Sketch allows you to draw a multi-sided bounding box - but not curves).
Draw the bounding box (if Rectangle pick diagonal corners).
Select the bounding box (not the reference circle).
The view's properties will be display in the Properties window.
In the Properties window:
Rename the view with a prefix of X-yourintitals_ - (e.g. X-BH_NW Corner Detail).
Also change Sheet Series.SH parameter to working.
Next change the detail type to working.
Click on the triangle to right in top box of Properties window.
Under Detail View select working.
The Callout reference may disappear if you created it in a view that is on a sheet.
However you will find in the Project Browser under working:
which is why it is important to ALWAYS NAME THE VIEWS YOU CREATE.