Azure Backend with C #. Create a new field in a table

I have a backend built in C #, with Microsoft Azure and SQL Server database.

To add a new field to a table, what should I do?

Would you just go to the designer of this table via visual studio, add what I want and click update?

My configuration:

public Configuration()
        {
            AutomaticMigrationsEnabled = true;
            AutomaticMigrationDataLossAllowed = true;
            ContextKey = "appService.Models.appContext";
            SetSqlGenerator("System.Data.SqlClient", new EntityTableSqlGenerator());
        }