Format

A file format is a particular way that information is encoded for storage in a computer file.

Source Wikipedia

Font

The Font is a type of specification for documents. It makes lettering darker and fancier.

Folders

A group of files that may have a specific category.

First Line Indent

It is a way to put a spacing on paragraphs for organization.

File Extension

A file name extension is a suffix to the name of a computer file applied to indicate the encoding convention (file format) of its contents.

en.wikipedia.org/wiki/File_extensions

File Compatibilty

A way to insure that one file is compatible with a different software.

File

A file is a form of storage and it used mainly to display information.