[Android app][3.25.0]

I love this app so much and use it for studying. I thank the developers for creating such a wonderful application.

I wonder if it's possible to add a laser tool for annotation of study materials.

aslo I hope that folders can be added inside a folder for better organization. I also hope that the files inside the folders can be sorted alphabetically. Would it also be possible to save the files into a gdrive? If these can be done this could be the perfect application for studying.