While viewing a file, V will highlight an entire word by double-clicking anywhere on the word. By default, a word is defined to consist of alphanumeric characters (ie, a-z, A-Z, 0-9) and an underscore .

Pressing the shift key while double-clicking on a word uses an extended character set to determine what characters to highlight. By default, the extended character set consists of all alphanumeric characters and any character not contained in the following: