To modify maps within the publication tree of Publication Manager, you must open a publication that uses the map version that you need to modify.
However, you can add or update XML attributes of a map, such as bundle name, by opening from Oxygen XML Author. To select a version of the map, you can use the Versions option available at the lower-left corner.
If a map is released, and you want to check out, the system prompts you to create a new version or a branch. Always, create a new version for the latest version of the map. You must create a branch only when you are checking out an older version of the map.