We've tried to build PERRLA Online so that the interface is a good size for the majority of computer screens. But that doesn't mean it's great for everyone.
Luckily, as a web app, it's easy to make the interface size larger or smaller to fit your computer's screen.
Windows Instructions
To make the interface bigger: Press Ctrl & +
To make the interface smaller: Press Ctrl & -
You can do this as much or as little as you need.
Mac Instructions
To make the interface bigger: Press Cmd & +
To make the interface smaller: Press Cmd & -
You can do this as much or as little as you need.
These same options can also be used inside the side panel with the PERRLA for Word Add-in. Just be sure your cursor's focus is inside the side panel and not in the Word document.