I’m a bit embarrassed that I haven’t noticed this mode before, and I don’t even know if it was added recently or a long time ago. You can then tap where you want it to magnify, write in the large magnified area at the bottom, have it be shrunk down, use auto-advance, and so on. When you are in that mode, however, there’s an icon with a rectangle and a magnifying glass at the bottom that activates partial zoom mode. There’s an curvy icon that indicates freehand annotation, which I already knew about. You first have to open the annotation menu, either by accessing it on the side (while the UI is active) or long-pressing on the page. The feature isn’t very obvious in the UI, unlike for apps that are designed specifically for note taking. Turns out, GoodReader has its own version of partial zoom annotation.

I’ve used it together with other apps, like GoodNotes (not the same developer), because I need a way to annotate PDF documents properly. That recently happened with me and GoodReader, the iPad document reader app I adore and have used for a year and a half.

Sometimes, you discover something about an app that just makes you feel silly.

Goodreader ipad