todo-mode: Reprioritizing Items

 
 5.3.3.1 Reprioritizing Items
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 There are three ways to change a todo item’s priority:
 
 ‘r’
      Raise the current item’s priority by one, exchanging its position
      in the list with that of the item directly above it
      (‘todo-raise-item-priority’).
 
 ‘l’
      Lower the current item’s priority by one, exchanging its position
      in the list with that of the item directly below it
      (‘todo-lower-item-priority’).
 
 ‘#’
      Prompt for a number and relocate the item to the corresponding
      position in the list (‘todo-set-item-priority’).  For example,
      entering ‘3’ at the prompt makes the item the third in the
      category, i.e., gives it third highest priority; all lower priority
      items are pushed down by one.  You can also pass the desired
      priority as a numeric prefix argument, e.g., ‘3 #’ gives the item
      third highest priority without prompting.  (Prefix arguments have
      no effect with ‘r’ or ‘l’.)