Perspective PowerChart Pen data

In all the examples in the user manual, and IU, there are 3 pens shown in the pen data at the bottom of the PowerChart. Is there a way to configure this so e.g. I can have 4 pens shown before needing to scroll?

8.1.18

There is no configuration property for determining the size of that panel, but you could modify your custom.css file to increase the size of that panel to something slightly larger/taller by default.