How to search for field names of an object (i.e. columns names from tables or views).
Go to Tools | Object Search. Entering key word(s) to search, specify database, and where to search. Option to search source code or columns of tables/views/indexes is an option.
Available in various versions of Toad (i.e. for SQL Server, for DB2, and Toad for Data Analysts, and other .NET based Toad tools).