Marantz RC3200 - Manual (Page 25)

User Guide
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12 Press Stop to stop recording.
A message screen appears.
13 Press OK to save the macro and return to the Mode Menu. The
existing command of the selected button is replaced by the
macro.
-or-
Press Cancel to return to the Mode Menu without saving the
macro. The button retains its previous command.
14 Set the RC3200 in Use mode to test the recorded macro. If you
need to make changes, re-record the macro from the beginning.
Setting Up Your RC3200