I have searched high and low for this feature and I am having zero luck. I hope someone here might be able to help me. I am looking for a note taking app that would allow me to copy and paste a portion of a PDF file into a new note page so that I could annotate just that portion. For example, if I had a PDF file of math problems, I'd like to be able to copy and paste one problem from the file and use a new page of notes in order to handwrite a solution underneath the copied problem. Can anyone suggest an app? Thanks in advance.