You can change the case of text: Toggle case "HellO" to "hELLo" with g~ then a movement. Uppercase "HellO" to "HELLO" with gU then a movement. Lowercase "HellO" to "hello" with gu then a movement. Alternatively, you can visually select text then press ~ to toggle case, or U to convert to uppercase, or u to convert to lowercase. Examples[] ~ Toggle case of the character under the cursor, or all vis