Dear Luis,
1. Actually, check out our latest 2020.2 version, you can create your own windowing presets:
https://www.radiantviewer.com/beta/
2. We don't plan to integrate the MIP mode into the 2D viewer anytime soon...
3. I'm not totally sure how you would like to organize the studies, could you elaborate?
4. Again, could you provide more details, which border is lost?
Greetings!