In Samsung Notes, we are able to split the screen - be it vertically or horizontally - and at various sizes, so that we can look at a pdf or other notes while also working on homework or other coursework. Only Nebo that I know of is also able to do this, but not GoodNotes yet. Or if it can't be done with the Samsung or Chrome options to do so, if this could be done via inside the Goodnotes app - via tabs, that could be beneficial.