BOOX 2.2.2 Firmware Update Is Available Now

Onyx Boox, is a brand of eBook reader produced by Onyx International Inc based in China, has been making e-readers for 10 years and the company has a number of e-readers they are currently selling. Recently, they had released a firmware update which was available for all Onyx BOOX e-readers and E-Notes that run Android 6.0 OS, such as the Max2 Pro, Max2, Note Pro Nova Pro, Note and others. Good news is that this great update includes many new features which is dedicated to improving user experience.
According to BOOX Firmware 2.2.2 changelog, below are their new features: 
1. Allow scribbles for flow documents. The pages with scribbles can be exported from TOC (do not support embedding scribbles to original flow documents).
2. Support full-page translation, which can be activated via Menu — Split View — Page Translation.
3. Now PDFs also allow scribbles after reflow.
4. PDFs auto-fits the display width in landscape mode.
5. Flow documents support highlight across pages (PDFs do not support).
6. Added a zoom function (maximum zoom level: 16x) to the Note app, and adjusted the tool placement.
7. Added a language option on the AI interface.
8. Optimized the brush latency for gray colors.
9. Long-pressing on app icons for optimization is back now.
10. Added a language option on the handwriting keyboard interface, adjusted the placement for speech input.
11. Optimized the speech recognition interface, and add punctuation input.
12. The system contrast can be set individually on the drop-down menu.

So you can now edit ebooks in Onyx Boox devices after updating the BOOX 2.2.2 Firmware. Before, you can only scribble on PDF documents, but from now on, you can also edit epub, mobi, txt, and all formats you may use.
Bonus tip: if you want to read DRM protected Kindle books on your Onyx Boox reader, you can read this guide on how to read any Kindle books on Boox.