Document how to print to preferred (SI) units. (PainterQubits#276)

sostock · Oct 15, 2019 · dd666f9 · dd666f9
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commit dd666f9
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diff --git a/docs/src/index.md b/docs/src/index.md
@@ -99,6 +99,13 @@ julia> mod(1hr+3minute+5s, 24s)
 17//1 s
 ```
 
+One useful interactive function is being able to convert to preferred (in this case SI) units. 
+
+```jldoctest
+julia> upreferred(F/m)
+A^2 s^4 kg^-1 m^-3
+```
+
 !!! note
     Quantities in `°C` or `⁠°F` always unit-convert under an affine transformation that takes
     their relative scales into account. To avoid ambiguities that can lead to incorrect