Hi Victor,
Thanks for the reply! Because I document all my manuals in the format with #mask: and then some tips. So if I do grep -A 4 \#mask usually only return one result with 5 lines of brief explanation. So it should work. (if better, could it pass two argument like mask, 6 indicating the line number?
BTW, it will also be helpful to recommend other ways to check for my personal notes.
Best