[Feature] Small subtitle below title

[bilogic]

I use this for battery level graphing so currently it looks something like

Battery

60%

Would be great if I can add a small value under the title for the current temperature

Battery

32°C

60%

Or to the right of 60% in very small font

[ildar170975]

Since you need to show some VALUE - you would expect a template support for this "subtitle".
Templates are not supported by the card.
Consider using card-mod which supports jinja, examples here:
https://community.home-assistant.io/t/lovelace-mini-graph-card/71385/1733
https://community.home-assistant.io/t/lovelace-mini-graph-card/71385/2023