Once you have collected and summarized the information, it’s time to highlight some key elements. Include index information like the author’s name, book location, or the link URL. For longer Zettels, highlighting the learning objectives or key points in a bullet list might be helpful. The main point is to write your notes in such a way that you will easily be able to quickly get the gist of the material when you come across it again.
Step 2: Rewrite your notes for the Zettelkasten : after you summrize 1- hightlight the key elements 2-set your index 3-the obective