When Microsoft Word or Apple Pages is the app in front, the toolbar shows the Text appearance ▾ button. Use it to make your document easier to read. Changes apply to the selected text, or to the whole document if nothing is selected.

Text appearance dropdown with Font, Size, smaller and larger buttons, Line and Letter spacing, and Colour.
The Text appearance dropdown, shown when Word or Pages is in front.
Font
OpenDyslexic, Atkinson Hyperlegible, Arial, Verdana, Comic Sans MS or Trebuchet MS.
Size (pt)
8 to 48 point, or use the smaller and larger buttons.
Spacing — Line
1.0 to 3.0 times normal line spacing.
Spacing — Letter
Extra space between letters.
Colour
The text colour.

Video help

A short video showing this feature in Readable for Mac v2. The video only contacts Vimeo once you press play.

Changing how text looks in Word and Pages