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We believe that one or more of the following statements are adequate descriptions:
Viper Is a Package for Emacs Rebels; it is a VI Plan for Emacs Rescue and/or a venomous VI PERil.
Technically speaking, Viper is a Vi emulation package for Emacs. It implements all Vi and Ex commands, occasionally improving on them and adding many new features. It gives the user the best of both worlds: Vi keystrokes for editing combined with the power of the Emacs environment.
Viper emulates Vi at several levels, from the one that closely follows Vi conventions to the one that departs from many of them. It has many customizable options, which can be used to tailor Viper to the work habits of various users. This manual describes Viper, concentrating on the differences from Vi and new features of Viper.
Viper, formerly known as VIP-19, was written by Michael Kifer. It is based on VIP version 3.5 by Masahiko Sato and VIP version 4.4 by Aamod Sane. Viper tries to be compatible with these packages.
Viper is intended to be usable without reading this manual -- the defaults are set to make Viper as close to Vi as possible. At startup, Viper will try to set the most appropriate default environment for you, based on your familiarity with Emacs. It will also tell you the basic GNU Emacs window management commands to help you start immediately.
Although this manual explains how to customize Viper, some basic familiarity with Emacs Lisp would be a plus.
It is recommended that you read the Overview node. The other nodes may be visited as needed.
Comments and bug reports are welcome.
firstname.lastname@example.org is the current address for Viper bug reports.
Please use the Ex command :submitReport for this purpose.
1. Overview of Viper Must read to get started 2. Improvements over Vi New features, Improvements 3. Customization How to customize Viper 4. Commands Vi and Ex Commands
Key Index Index of Vi and Ex Commands Function Index Index of Viper Functions Variable Index Index of Viper Variables Package Index Index of Packages Mentioned in this Document Concept Index Vi, Ex and Emacs concepts
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