Set default decimal places for chart equations?

I don’t understand why the default for trend line equations should be 11 decimal places. Is there any way to change the default? I know I can manually change the decimal places and am not asking about that. I just don’t like having to adjust the decimal places every single time.

I know I can manually change the decimal places and am not asking about that

Then what you are asking about is - enhancement request, which is off-topic here.

Before filing an enhancement request, I wanted to be sure that there is no existing way to do it. That is why I posted the question here.
Thank you for making the answer clear.