It would be really good to have colour coding for power and HR based on your zones and maybe a label too like tempo, endurance etc… Colours are a lot easier to remember than a range of numbers and easier to spot if you go into a higher or lower zone, especially with FTP changes where the figures change as you improve.
There is a display option you can turn on that graphs power (by color) and HR (no zone coloring) at the bottom of the screen. Depending on whether you are using a laptop, iPhone, Apple TV, etc., the method is slightly different.
For a laptop, if I remember correctly, it’s the “g” key. For iOS, there should be graph button.