In the optional
units clause, we can define units to use in relative calculations.
variables also works the same way.
The four predefined ones are
U: 19.05 # 19.05mm MX spacingu: 19 # 19mm MX spacingcx: 18 # 18mm Choc X spacingcy: 17 # 17mm Choc Y spacing
But we can add any other (or modify these predefined ones), or even use an existing measure in calculating a new value (for example,
double: 2 u).
Recall how each string that can be interpreted as a math formula will be treated like a number, so this is a great way to add math-level variables to your config.
units: a: cy - 7 b: a * 1.5
In fact, there are also a few internal variables that rely on previous units and formulas to provide easily overrideable default values to certain key-level attributes (for further explanation, see the points section):
$default_stagger: 0,$default_spread: 'u',$default_splay: 0,$default_height: 'u-1',$default_width: 'u-1',$default_padding: 'u',$default_autobind: 10