Paste here all your text (open pdf, ctrl + A, ctrl + c, click here, ctrl + v)
When summarizing in latex,
it's a good practice to copy the whole text. (paragraph by paragraph)
And then start reading and summarize the text, without deleting it.
(i.e. when commented, you can leave it there)
This next tool lets you make comments of the text, to paste in your latex editor.
(i.e. adding % in front of every line)