Register in Vim

Numbered Register 0 - 9

Vim fills numbered registers with text from yank and delete commands.

• reg 0 contains the text from the most recent yank command;
• reg 1 contains the text deleted by the most recent delete or change command;
• With each successive deletion or change, Vim shifts the previous contents of reg 1 into reg 2, 2 into 3, and so forth, losing the previous contents of reg 9.

Named registers "a to "z or "A to "Z

Vim fills named registers only when you say so.

• lowercase: replace their previous contents;
• uppercase:  append to their previous contents.