A file extension, or file name extension, is the letters immediately shown after the last period in a file name. For example, the file extension.txt has an extension of .txt. This extension allows the ...

How to format a table of contents in a Word document Your email has been sent If you’re working on a document that requires a table of contents, Microsoft Word has an easy-to-implement feature based ...

A file extension is a suffix that is added to the end of a file name after a dot. It is usually two to four letters long. File extensions help Windows and other operating systems to know the standard ...