I suspect that the writer may not be a native English speaker. He may find
it difficult to read the Help link.
It sounds as if Mohammadreza wants to know what those right-click options on
Notepad are about, what they do.
I don't have them on the right-click of Notepad in Windows 2000 and I don't
know if they are native to later version of Windows or if they have been put
there by another program.
The writer will want to know if they are safe or useful to him.
Maybe someone else can fill the gap.