Second, I don't know what pen you like to use to make drafts. I used to answer the manuscript with a pencil and do the questions with a pen, so it has been slower to change. Then the pen was much faster.
It is normal to feel nervous about the exam. In the past, I had to check every time I finished a question, and even I had to do a question several times. Personally, I feel that to overcome this, I have to start from the usual time. Students who usually finish the questions like to get the answers right, which is easy to cause dependence. We should cultivate the correct rate from the usual time, so that we are not easy to be nervous during the exam.
Fourth, this method was told by the teacher in junior high school that it had not been practiced. You can try. Click a point on the draft paper before the exam and see if you can find it after the exam. If you can, it means that your mentality is not bad, hehe.
(The above contents are all done by hand, combined with personal experience, I hope to give you some help.)