Provide an option to change size of the fonts and the notes window.
Based on suggestion on the webstore page: https://chrome.google.com/webstore/detail/page-notes/omjdheidbhoghpfdnndkgoelfiogjfla/support?hl=en-US
I think it makes sense. Page notes can be used for more than just taking small notes, e.g. lets say you're planning a trip and visiting tripadvisor, you can use page notes for taking notes.