''deck_macroadd: <key> | up/down | //<delay>// :: <command>''

Adds a command to the [[concepts:macros:|macro]] associated with the given key and direction.

  * **key** is the key to add the macro to - note that this is zero-indexed
  * **up/down** determines which direction the macro will be added to
  * **delay** is optional; it is the delay in milliseconds of the command in the macro
  * **command** is the command to be added to the macro - in the standard format