Add detail to README.md about how to draw a pointer

README.md

@@ -20,6 +20,16 @@ An easy to use, themeable component for randomising choices and prizes.
 - Callbacks for events like `onSpin` and `onCurrentIndexChange`.
 - Clockwise and anticlockwise spinning.
 
+## Examples
+
+- [Basic ESM](https://crazytim.github.io/spin-wheel/examples/esm)
+- [Basic IIFE](https://crazytim.github.io/spin-wheel/examples/iife)
+- [Basic Vue](https://crazytim.github.io/spin-wheel/examples/vue3/dist)
+- [Spin to a specific item](https://crazytim.github.io/spin-wheel/examples/spin-to-item)
+- [Multiple Wheels](https://crazytim.github.io/spin-wheel/examples/multiple)
+- [Themes](https://crazytim.github.io/spin-wheel/examples/themes)
+- [Developer playground (for testing and troubleshooting)](https://crazytim.github.io/spin-wheel/examples/playground)
+
 ## Installation
 
 ### ESM
@@ -78,15 +88,16 @@ wheel.spinToItem(winningItemIndex, duration, true, 2, 1, easing)
 
 If precision is not important, you can use `Wheel.spin()` to immediately start spinning the wheel at a certain speed, which will be reduced over time according to `Wheel.rotationResistance`. You can also set `Wheel.isInteractive = true` to allow the user to spin the wheel themselves by dragging or flicking.
 
-## Examples
+## How to draw the pointer
 
-- [Basic ESM](https://crazytim.github.io/spin-wheel/examples/esm)
-- [Basic IIFE](https://crazytim.github.io/spin-wheel/examples/iife)
-- [Basic Vue](https://crazytim.github.io/spin-wheel/examples/vue3/dist)
-- [Spin to a specific item](https://crazytim.github.io/spin-wheel/examples/spin-to-item)
-- [Multiple Wheels](https://crazytim.github.io/spin-wheel/examples/multiple)
-- [Themes](https://crazytim.github.io/spin-wheel/examples/themes)
-- [Developer playground (for testing and troubleshooting)](https://crazytim.github.io/spin-wheel/examples/playground)
+A pointer is not drawn on the Wheel, instead you set `Wheel.pointerAngle` and need to draw the pointer yourself. This is because there are varied ways you might want the pointer to appear and behave, for example you might want to animate it.
+
+Your options for drawing the pointer are:
+
+- Overlay an image using `Wheel.overlayImage`
+- Overlay something using the DOM
+
+Feel free to use and adjust an image from one the examples.
 
 ## Configuration