How do you change your arrow on your website?
If you mean your cursor you do this with CSS
What are the change which western influence made umaro and hisneighbouring district in arrow of god?
You can not type the letters upside down unless you are using an online tool like the website in the related link. You could however change your screen's display to where it is upside down, however this will not change the way the screen will print. To flip your screen upside down hold ctrl alt and then press the down arrow key.