- Select the text with a white background and click on it.
- Read through the words for about 1 minute – they do not make sense!
- Do the words appear to move, wobble or flicker or can you see strange patterns in the words?
- If you experience any of these symptoms, try each of the overlay colours in turn and see if the symptoms are reduced by any particular colour
- Narrow down your choice to one overlay colour
- Click on i next to the thumbnail to show the Overlay letter
Please note: the screen colours may differ slightly from the actual overlay colours supplied due to variations in the colour reproduction of different computer displays