When reading a book, you have two options to adjust how the text appears on your screen.
Fit the book to your screen
Click the fit-to-screen button (the icon with arrows pointing inward, located in the top toolbar) to automatically resize the book to fit your screen.
Zoom in or out
Use the — 100% + controls in the top toolbar to manually make the text bigger or smaller. Click + to zoom in and — to zoom out.
