Create a new user in SQL Server 2012

First, the problem description

When I first loaded SQL Server 2012, I chose Windows Authentication, and now I want to add a user with SQL Server authentication.

Second, specific ideas

1. New User

2. Add the new user to the appropriate database user list

3. Configure User Rights

4. Changing server Authentication Mode

Third, the solution process

1. Right-click to select New login name

2. Add the new user to the appropriate database user list

2.1 Modify user name, password, authentication method

2.1 Modifying User mappings

2.3 Modifying the State

3. Configure User Rights

4. Changing server Authentication Mode