2 important thinks to have in mind to be added.
1st. With the night view there is no chance to write and view what you are writing. I mean, with the colour invertion, the pencil invertion is not included. You need to set the DONE button, to see the writing.
2nd. It is imperative to have an eraser bug. The undo option it’s not friendly enough to erase little things.
Thks.