Thread:Bilalasad/@comment-22439-20161014204049/@comment-25205196-20161016104009

Level tables cannot be directly edited from the main article page. They are actually sub pages which are integrated into the main article thanks to tabs (which apparently you can only set via the source editor). Everybody can update the list at Reputation/Level1 and Reputation/Level2.

The source editor is a type of editor you can use on the wiki for more precise and more complex editing. However, it means getting familiar with wikitext, which is the language used on wikis. The other editors basically write the code for you instead. You can pick your editor at Special:Preferences.