Help > Authoring > Fundamental Tasks > Understanding the Edit Window > Controlling the Screen View of a Document > Changing the Display Size of Text and Tags
  
Changing the Display Size of Text and Tags
You can change the text and tags as they are seen on screen in one of two ways:
Click on the Increase Font icon on the toolbar to increase the size of the text on your screen. Click on the Decrease Font icon to shrink the text.
Change your default font scaling preference by choosing Tools > Preferences, then choose the View category and set the Font Scaling to the desired percent.
Using these methods to resize your screen text display only changes the Edit window screen display and printed output of the Edit window view. It does not affect published output.