Register new Server Name in Sql Managment Studio

Question

i want to know is there anyway to register new server in SqlServer Managment Studio??Except the General way in Managment Studio

my Master said there is a Way but i forgot to ask him??(i know we can register new server name in Sql Managment studio by Right click on Current ServerName and click Register but some body say its not a good way to register)

Now i have a server name with windows authentication Security,is there anyway to create a Server Name with user pass(without uninstalling Sql Server)

Answer 1

in the link below i uploaded the pics for changing from windows authentication to sql server authentication:

change windows authentication to sql authentication

Answer 2

Press CTRL + ALT + G, this will show the registered servers window, now add a new server group, then add it there or just add the server under the main folder. You do this by right clicking on the group and selecting New Server Registration