This feature doesn't appear to be supported, but I want to ask anyways. I am looking to map a sub-release to more than (1) master release. The master release roadmap view is highly valuable to me for communicating "market" releases across all product lines. However, many times for us different product releases use the same version of an underlying component (sub-release) due to the commonality of our piece parts. I don't seem to be able to map a single sub-release item to multiple product master releases.