How does “use display default” work?

Use case: I’d like to set this to say 2, then add a bunch of gauges of the same class that all require 2 decimal places, and they then have 2 decimal places.

Where can the display default be found, reviewed and changed?
Could this be set by the Pid definition file for each pid.

Right now I have a minimum of 6 press/clicks on each gauge to fix the number of decimal places. It gets old quickly when you have dozens of gauges to fix.

BTW, I’ve tried searching this forum for “use display default” to see if this has been discussed before, but get tons of results none of which contains this string. Also tried use+display+default – get nothing there.

Is there a place on the forum that shows options for the search feature bc I cant seem to get it to do anything really useful.

https://photos.app.goo.gl/nREz5DPSK4GiMtVK6
Here is an example on one of many dash screens (I often use 15 dashboard screens)

I use Torque to show EV data which can include 100+ cell voltage and temp gauges.
In this screen you see gauges with 2,3,1 and no decimal places.

Suggestions:
Create a menu item that lets user set the default number of decimal places. It then applies to future gauge adds.

When press on a gauge, provide a ‘set decimal places to default[2]’ option or similar

Allow default number of decimal places to be defined in the ext pid file.
e.g. here is an example from my current ext pids file;
“0GEN6 Cell063V”,”Cell63″,”22F805″,”((E*256)+F)/100.0″,”0″,”5″,”V”,”7E3″

could have an extra tag to set suggested decimal places to 2;

“0GEN6 Cell063V”,”Cell63″,”22F805″,”((E*256)+F)/100.0″,”0″,”5″,”V”,”7E3″,”dp=2″
But user should still be able to override