This book deals with plugins for the Vim text editor, their creation, usage and appliance. In particular, it is focused on one specific plugin, which makes editing of configuration files for the MUFIN experimental system easier. This plugin highlights the syntax and completes the keywords according to the syntax of configuration file. It also makes writing of new rules easier, with automatic completion of rules'' starts based on the previous ones. The plugin uses an external dictionary for automatic completion of keywords, and is automatically loaded when the configuration file is opened.