Most of us can agree that a page of notes with no lines looks neater and as a result, makes notes more appealing and engaging. However, handwriting on a blank page can often lead to slanted writing which has the opposite effect. Therefore a very useful feature (I believe) would be to have a feature where if you zoom/close up on your notes page, gridlines show up, and then when you zoom out, the page returns to having a blank (no lines) background.