> For the complete documentation index, see [llms.txt](https://help.readermode.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.readermode.io/using-reader-mode/reading-ruler.md).

# Reading Ruler

A reading ruler is a simple yet effective tool that can help individuals with dyslexia read more efficiently. It is a long and narrow overlay that can be placed over the text, highlighting one line at a time. The ruler can be set to different colors, and the user can choose the one that works best for them.

{% embed url="<https://youtu.be/9ZpVv7FHCF4>" %}

**How to use a Reading Ruler tool**

Using a reading ruler tool is easy. Here are the steps:

* Click on the [Settings menu](/using-reader-mode/reader-mode/reader-mode-settings.md)
* Click the "Reading Ruler" section
* Tick the "Display Ruler" checkbox
* Make the ruler's adjustment of the color, height and position to your liking
* Click `Save`

Now everytime you visit the page and open the reader, the ruler will be there to guide your reading.

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