Highlight option for blurb of reading passage

This is a suggestion for the Reading and Writing Sections of Practice SAT Tests, available on Khan Academy. I would like to suggest a highlight option for the blurb of the reading passage and the questions beside them. On a real SAT we would have to chance to underline keywords in the blurb as well as  the questions asked, so why not include similar option in the online practice tests?

It would be helpful while attempting the tests.