How to Put Password on MS Word File

There are two ways of protecting ms word file through password.

While saving file, click on tools and then click security options, where you would have two options, one for protecting file completely which means, no body would be able to open the file until and unless he enters the password

2nd is you put password in readonly column, after which any user can open the file, but without no right to change any thing in the document. He can only view .