We said in the beginning that underlining is a personal technique, therefore every person can have his or her own code when doing it.
Regardless, we suggest a few ideas that might help you underline text more efficiently.
Now we’ll review the types of underlining, visual strategies, and codes that you can use.
Using lines consists in highlighting text with different types of lines (straight, double, broken lines, waves, etc.), under or over the words -if it’s done with a marker-, and using boxes, arrows, etc., focusing on the main ideas, the secondary ones, interesting details, etc. You can use one or more colors. At first, it’s better to use a pencil, so you can do any necessary corrections; but later, it’s important that you use a color that stands out from the printed text.
Naturally, you don’t have to use all of the techniques suggested here, not even the ones we name here.
Structural highlighting consists in underlining the structure or internal order of the text. This type of underlining is usually done on the left margin, using letters, numbers, arrows, keywords, etc. This makes it a lot easier to write summaries and diagrams.
Highlighting consists in underlining questions, explanations, points of interest, key ideas, what the text is suggesting, etc. To do this one usually uses the right margin, using words, questions, parenthesis, asterisks, arrows, signs, vertical lines, etc.
You can use this code, or create your own. Always remember that underlining is a personal technique.