@dan I think the code for the single mode example on the Theme Spacing page in the manual misses a “,” at the end of the “format”: “top-{{value}}” line. 
Oh good catch, you win a cookie 
Have updated the manual now with the correction 
Thanks!
@dan I think the code for the single mode example on the Theme Spacing page in the manual misses a “,” at the end of the “format”: “top-{{value}}” line.
Oh good catch, you win a cookie
Have updated the manual now with the correction
Thanks!