you can change it in css/custom.css file

 body {
 	zoom: 75%;
 }

I didn’t find why the config file value is not taken in consideration. I assume something is overwriting this value.

Same problem. Have a look on https://forum.magicmirror.builders/topic/1521/zoom-scaling/3 there’s a workaround

you can change it in css/custom.css file

 body {
 	zoom: 75%;
 }

I didn’t find why the config file value is not taken in consideration. I assume something is overwriting this value.