Review text

[ojack]

The intro text refers to "five types of functions in hydra", but then there are more than 5 categories.

There are five types of functions in hydra: source, geometry, color, blend, and modulate. Click on a function below to show its usage.

I still think this makes sense in terms of explaining hydra main syntax. perhaps we just can change it to "there are five main types of functions in hydra: source, geometry, color, blend, and modulate. "

Wondering whether there should just be an additional heading between these functions and the additional ones later on (after modulate and before external sources.