Using my dorky notation...

This notation was conceived to spot vocabulary words, and is a little clunky until you get used to it, but I find it beats scanning entire pages of text or counting each line from the top of a page when counting from the bottom would make more sense.

Examples...

89+4
    Fourth line from the top of page 89.

606-5
    Five lines from the bottom of page 606. (A minus sign instead of plus indicates
    the number of lines counted from the bottom of the indicated page or paragraph.)

138.4+3
    138 is the page number.
    4 indicates the 4th paragraph which begins on that page. (Basically scan for
        the 4th indent, and then count down 3 lines, because in this example...)
    3 indicates the 3rd line in the 4th paragraph.

428.0-4
    428 means page 428 of course.
    0 means the word (or tag, or whatever you seek) is located in the paragraph begun on the preceding
        page (i.e. prior to the first indent on p. 428.)
    -4 means the 4th line from the end of that paragraph.