Enable Kindle Reading Ruler

Turn on the Kindle Reading Ruler to gain focus and read more easily.

You can use the Reading Ruler on the Kindle apps for iOS, Android, and Fire tablets.
  1. Open the Kindle app.
  2. Select a book to read.
  3. While reading, tap the center of the screen to display the reading toolbar.
  4. Select the Aa icon then the More tab.
  5. Select Reading Ruler and then turn it On.
    Note: You will be prompted to enable continuous scrolling for Android and Fire tablets. You can also enable continuous scrolling in the Layout tab of the Aa menu.
  6. Select from the available options for color, opacity, style, and size.