While reading the text the second time, you have to scan the text. Scanning means running through the text with some questions. While scanning, ask the questions to yourself like: what it is about? What are the details given in each paragraph? What is unnecessary in particular paragraphs like examples, descriptions, details, such as dates, numbers or statistics, etc.? What should be the appropriate title? Then, while scanning underline the keywords. It will be helpful in your next step. You can note it down on the last page of the answer sheet or in the margin of question paper with a pencil.