Scatter Chart - Play Axis options

The Power BI Scatter Chart has a Play Axis which works really well for showing changes over time or some other dimension. 

1. How do I change the placement, formatting, etc. of the large text that appears in the upper right hand corner of the visual (the values of the Play Axis dimension)? 

2. How do I change the order over which the the Play Axis values are "played"? For example, I might want descending order, or I might want to have the order based on a secondary data field. 

I don't have an example. The questions are straightforward enough I think that an example is not needed. Thanks.