What were you trying to achieve? You can annotate the point (Right click the point -choose annotate and fill in what you want)
You can also form it as a part of an action. Select an individual month but it filters another sheet in your dashboard and it will give a more focused view of that month. Say instead of the sum of your metric the daily breakdown or the regional breakdown of your metric.
Give us some insight what you're trying to analyse and someone can assist you.
Here is one way to emphasize a point
The same applies to Max point, Min point.
In general, the following can all help:
- Drill down by action filters
- Tool tips