Hi Peter, The simple answer is that you can mix and match virtually any of the variation parts of one composer memory to another composer memory, or even within the same memory. The parts should be from composer styles with the same bar length. Copying any Fill-in to another Fill-in is possible - again, provided they are the same length - usually just one bar. This can be done from one composer style to another or within the same composer style. Incidentally, it is quite possible to create Fill-ins of more than just one bar and style lengths can be up to 16 bars

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Willum