The "Ruler" is a simple widget that supports dyslexic students reading and tracking text.
Design of a ‘ruler’ widget that floats on top of any document and can be controlled with the mouse, it takes the form of an opaque coloured ruler. It can be stretched or expanded to cover a small or large amount of text. The ruler edges can be bold or the same colour as the body. It will act as a coloured overlay to reduce visual stress. A colour palette will allow the choice of any colour. Ruler Learning Design Template
Open this widget in Opera (version 10.6 or later).