Pore, in this sense, can only be used in conjunction with ‘over’ or ‘through’ and means to be absorbed in the reading or study of.
Pour means to flow or cause to flow in a steady stream; to prepare and serve (a drink).
My trick for remembering it is to think of the U in pour as like a tiny bucket that things could be poured into. So this is the spelling to use when thinking of flowing.
“She filled a bowl with cereal. She poured over the milk.” This would mean that she put milk on her Corn Flakes.
“She filled a bowl with cereal. She pored over the milk.” This means that she stopped after getting her Corn Flakes to examine the milk closely.
Similarly, if one were to write, “She poured over her book” we would all wonder what she’d poured over it and why.
Pore is also a noun, meaning the tiny holes in faces, but let’s not worry about that now.
Was that of any use to you at all? Likes, shares and comments all wildly appreciated.