Find Views Not on Sheets

You will need this to find those drafting views and braced frame elevations that have not been placed on a sheet:

From the View ribbon, select User Interface (far right), then click Browser Organization. Select the "not on sheets" filter.

Obviously, you'll want to return the filter to "all" after you've located your missing views.

It is probably also a good idea to check this filter from time to time just in case, sloppy Revit users sometimes delete things they shouldn't.