I also tried using the zoom setting yesterday, both in in the main configuration (under the ip address whitelist) and inside of various modules. I saw no change to the size of anything, and I tried values from 10.0 to 0.1. Not sure of the proper format, i used both zoom: ‘0.5’, and zoom: 0.5,.

Not sure if it makes a difference but I am running mine serveronly on a Pi3 and viewing on a web page on a Pi0.