Split screen and lined paper

Split screen and lined paper

I am new to the app and see there is a function where you can create a split screen and drag/drop from the 2nd screen into a notecard in notebook. How do I create the split screen?  
Also, I saw someone using the app and while taking notes he changed his notecard paper to look like a notebook or graph paper and he was also able to make his note paper look like a yellow pad. Where are those features?

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