[Enhancement] Values as variables 
Have a central spot to host values as variables. This way, if you want to change the value of spacing, you could do it in one spot; rather than tediously changing all occurrences through your document.

For example:
* **small** = 8
* **medium** = 16
* **large** = 32

Then using them with the variables, instead of **[8 16]**, it would **[small medium]**

That way, changing the value of **medium** to be '20'; simply change it in the centralised place.