Yes. Make sure you are using the CONTROL track. In step record, bring up CONTROL track. At the bottom of the screen you will see the tempo number you are in. Go to the measure you want to start to retard. Then turn the TEMPO wheel down to the tempo number you want to end with. When you start turning the Tempo wheel down, you will see the tempo change on the screen. When you are at the right measure, press the side bar where YES is. Done! If you want a very precise retarded ending, do a gradual tempo wheel change on each of the last 4 measures.
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