Fenix 7 - Is there an "overlay" that can be applied on top of charts that have room to display additional data fields?

I have a Fenix 7 and I use the Heart Rate Chart in a number of activities. It is on a separate data screen with a 1 Field layout; I do not want to use 2 Fields as it cuts the chart down to half the display.

I'd like to be able to overlay a "banner" that could accept custom data (specifically Aerobic TE) in the available space indicated by the red rectangle in the attached picture. I have searched Connect IQ - if I have missed the obvious, thanks in advance for directing me to a solution.