There is a very useful feature on wikia, one that we not-so-creatively call the "down arrow next to edit". Upon clicking this "down arrow next to edit" you'll unlock access to the edit buttons dropdown menu which is filled with tons of useful links.
Although it's in what seems like an obvious location, it's very often overlooked, so if you aren't fully sure what this guide is about, take a look at the image below.
Now let's get into all you need to know about the down arrow next to edit.
(Disclaimer:This doesn't actually include every last thing you will see or may be able to see, but this is the basics of what you'll need and what you need to know.)
If you're looking for something specific, this guide is separated into two section - Article and Photo/File.
The "edit intro" link allows you to edit only the "intro" of the article the same way you would when editing just a section of an article.
The "intro" includes anything that comes before the first section.
Unlike everything else you'll hear about here, this is not a wiki-wide feature, meaning it may or may not be on other wikis.
Classic Editor or Visual Editor
Depending on what your default editor is, you'll see either "Class Editor" or "Visual Editor". These links will allow you to easily access the other editor.
There are very many reasons why you might want to access a different editor, the most common being because you find editing something easier within a different editor.
You can change your default editor at any time by going to My preferences > Editing > Editing experience > Preferred editor.
The "history" link allows you to easily access the articles edit history.
The article history page is very useful for undoing edits, searching for old information, seeing why an edit was made and by who, and various other things.
You can learn more about page history here.
The "rename" link is one you likely won't find yourself using a lot, but should you ever find yourself in a case where you mispelled an article title or an article title is simply incorrect, this is the feature for you.
You can learn more about renaming articles here.
In addition to what's listed below, on photo/file pages you'll also see both "Edit Intro" and "History". They function the same as they do for articles, however aren't particularly useful here.
The "replace" link takes you to a page where you can replace the current version of the image/file.
Replacing is extremely useful for anyone who uploads photos/files as it allows you to update the image/file with a newer and/or better version.
You can also chose to replace a file by uploading a file of the same name, however, to avoid accidents the wiki recommends you simply use the replace feature.