There are a ton of cool tools for you to use all throughout the app. When you've clicked on a fragment you'll get a Tools menu. Here's what they do:
Zoom in / Zoom out - use to zoom the fragment image on the left. You can also use the keyboard shortcut ctrl+ / ctrl-
⬅️Pages - use this button to head back to the Pages page where you can see all your Pages and Fragments. This is also where you can get to the review mode, and also complete your menu
⛔️Remove OCR words - a cool feature. Sometimes the OCR shows your duplicate purple boxes around words, and so when you highlight them you get that word duplicated twice. This can happen with lower quality images. Once you click this button anything purple you click will be removed, allowing you to OCR like normal. This goes back to how it normally was once your refresh or head out then back into the fragment.
Other fragments for this Category - this will show you all the related fragments to the Category you're in for quick navigation. Only shows when there are more than one fragment.
Keyboard shortcuts - these work whilst in a fragment, the zoom shortcut works in all views.