Try the Zoom Return button

It is an icon on the eReader toolbar at the top of the page that looks like a magnifying glass with a leftward pointing arrow in it. You can see a picture of this on page 41 of the User Guide, which you can access by pressing the Help icon in the top right corner of the eReader.

Here is a link to the online PDF of the guide. https://www.entourageedge.com/suppor...User_Guide.pdf