https://blog.wongcw.com/2018/10/30/%e3%80%8amac%e6%95%99%e5%ad%b8%e3%80%8bmac%e4%b8%8d%e5%8f%af%e4%b8%8d%e7%9f%a5page-up%e3%80%81page-down%e3%80%81home%e3%80%81end%e9%8d%b5%e6%8c%89%e6%b3%95/