Annotation is tagging and highlighting in form of adding notes, lines, staining with the purpose to add captions, in order to re-understand and re-comprehend the contents of reading material quickly and concisely if one day you want read it again.
For detail about how to annotate, you may read in the following description ;
List of ways to Annotate
1. Provide a highlighter
You can make a highlighter color when you want to annotate words, phrases or sentences that considered as the key and important thing to the page you are reading.
If the color is considered too disturbing vision, you can underline by using pen with a little thick ink, in order can be easily recognizable.
If you do not intend to use pen , you may use a pencil as an alternative.
2. Provide parentheses
If highlighting and drawing line are too excessive and make your book not good. You can use parentheses that are placed at the beginning and at the end of the word, phrases or important sentences.
3. Giving a note yo the blank on the right side and the bottom of the text.
Like most books, the blanks are on the right and bottom margin. You can use this to add annotation of words or phrases that are at the heart of the read paragraph.
4. Create numbers
If you are reading a book to complete the questions of your task and homework, you can create numbers on the side of the text, that is the answer to the question. Do not forget to underline for easy recognition.
5. Put Symbols
You can also use symbols to mark things that are important where the symbols is only you can understand.