- 'ew' : open in the current buffer.
- 'es' : open in a horizontal split.
- 'ev' : open in a vertical split.
- 'et' : open in a new tab.
- 'fef' : formats the entire file.
- 'u' : converts the word to uppercase.
- 'l' : converts the word to lowercase.
- 'U' : converts the first char of word to uppercase. (not finished)