you must know what button will do what, so here is our next step Every Admin must know that what buttons suppose to do
You can see there are Three Buttons on every page. (If you can't see these buttons then don't worry, your Admin don't allow anyone to customize anything) And now you have to understand what these buttons can do.
1. Edit the content of page with Visual Editor/WySiWyG HTML Editor 2. Edit the content of page with HTML Editor 3. Delete/Remove Page (Do never click on this button, by clicking on this button the page will be deleted and there is no way to recover it back)
(I suggest if you don't know about Customizing HTML, then do not click any of them If you want to customize then you can request admin to customize, i will customize it as you say)