There is not a calculator on the computer version. There is a periodic table for you to refer to on the screen if you click on it. I'm not sure what you mean by highlight and ctrl F search... forgive my ignorance. You can go back to questions if you want to. Go to
www.opted.org... in the examinee's guide there are pictures of what the screens look like, if you are interested. Best of luck... p.greeneyes