▄ Block Commands
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  Mark block begin     │ Ctrl+K B
  Mark block end       │ Ctrl+K K
  Mark single word     │ Ctrl+K T
  Copy block           │ Ctrl+K C
  Move block           │ Ctrl+K V
  Delete block         │ Ctrl+K Y
  Read block from disk │ Ctrl+K R
  Write block to disk  │ Ctrl+K W
  Hide/display block   │ Ctrl+K H
  Print block          │ Ctrl+K P
  Indent block         │ Ctrl+K I
  Unindent block       │ Ctrl+K U