This document provides a summary of commands and modes in the Vi text editor. It begins with an overview of Vi's two modes: command mode, where cursor movement and text deletion/pasting occur, and insertion mode, entered by commands like i or a to insert text. The document then summarizes key commands for yanking (copying), changing, inserting, deleting, searching, replacing, and quitting text. It also covers regular expressions, counts, ranges, markers, files, and other Vi features.