These config settings will restrict the zoom slider to a user defined range instead of the current default of $[0.3, 10]$.
I'm not quite sure how it should look like in the config menu.
I could add two seperate sliders, but that would require extra code to prevent min being higher than max. Another way would be to add a custom slider element with two "grabbers" to specify the range.
Clicking the "Zoom" and "UI Scale" text should reset the Zoom/UIScale back to 100%. There should also be some kind of input field to enter a specific value.