The Dyslexia component will allow you to change the font of ALL text within the scene to the Dyslexia font, or another font. The attributes avaliable to change are:
To change the font, add the Dyslexia font to the New Font parameter by drag and drop, or by clicking the select button in the Inspector. The Original Font should also be added to enable the Action, and this will allow the font to be reset.
To change the font back to the original, execute the Action again with the Change Text Font unselected.
By using Variables, you can combine these with a GC Toggle in a UI Canvas, and allow the player to set their own preferences.