Highlighter Worthy
When studying or reading a book, we say something is 'highlighter worthy' if it is a main point that must be highlighted for further use or to solidify in the brain.
When studying for my driver's license test, I decided that in the manual where it says "It usually takes about one hour per drink to wear out of the system" this was a highlighter worthy phrase. I will need to know this for the test because I got it wrong the first time when I failed.