Umm.  Why are you not using a table here? 

The field editor does have a setting for “labels above values”  that might work. 

You can also override the css of the class: nx-basicfieldeditor-item-label  so its width is less than 40%.  (and adjust the 60% counterpart).  Dig into the developer console to see the classes and make real time adjustments. 

Hey Rob,

I have a different somewhat related issue. I’m using a table and I’m getting single spacing between rows. When I add a Boolean checkbox field to the table, the spacing becomes double. Is there something I can do about that? I should note that this is an aggregate model, if that makes a difference…

Without checkbox

With Checkbox