RedmineRoadmap » History » Version 4
If you select the Roadmap you will get an overview of the current state of your project, like the following:
There you can select which issues are open and which are closed. If you are interested into a detailed list of which issues are not solved you can simply click on to the number left to open, but if you like to know which issues are already solved simply click on the number left to closed. The green bar will indicate how far you away from finishing your milestone (98%).
You can change the configuration in that way that you will see an area with all related issues directly under the milestone. This behaviour can be changed as an administrator in the area of Trackers (link to it).
If you click on the milestone itself (0.8 right from the ) you can get an detailed list of the particular issues for the milestone.