Milestones within a phase Merged

I am in the process of creating a Gantt chart with various phases and activities. So far you can only add a milestone after a phase so that it is listed after all activities of that phase. Yet, I would like to be able to insert a milestones within a phase, below a certain set of activties. For example: in the screenshot attached I would like to have the Milestone "Decision meeting" listed after the activity PDCV-246.
Having this possibility would allow us to have an even better structure for our schedules.