update props docs

Author: jscottsmith

docs/parallax-component.md

@@ -41,11 +41,6 @@ const TranslateY = () => (
 
 ## Props
 
-All props for creating effects are defined by a _start_ and _end_ value represented by an `array` -- for example: `[start, end]`.
-
-- The _start_ of an effect begins when the element's original position enters the viewport -- the top of the element enters the bottom of the view.
-- The _end_ of an effect begins when the element's original position exits the viewport -- the bottom of the element exits the top of the view.
-
 The following are all props that can be passed to the `<Parallax>` component:
 
 ### Props: Configuration
@@ -63,6 +58,20 @@ The following are all props that can be passed to the `<Parallax>` component:
 
 ### Props: CSS Effects
 
+All props for creating CSS effects are defined by a **_start_** and **_end_** value represented by an `array`
+
+```jsx
+<Parallax scale={[start, end]}`/>
+```
+
+The **_start_** of an effect begins when the element's original position enters the viewport.
+
+- The top of the element enters the bottom of the view.
+
+The **_end_** of an effect begins when the element's original position exits the viewport.
+
+- the bottom of the element exits the top of the view.
+
 | Name           |           Type           | Description                                                                                                                           |
 | -------------- | :----------------------: | ------------------------------------------------------------------------------------------------------------------------------------- |
 | **translateX** | `string[]` or `number[]` | Start and end translation on x-axis in `%` or `px`. If no unit is passed percent is assumed. Percent is based on the elements width.  |