Thread:BunsenH/@comment-33517844-20171203181442/@comment-24577221-20171205012331

In your profile, under preferences, under editing, you can specify which editor you want to use by default.

When you go to edit a specific page, beside the "Edit" button is a button with a downwards-pointing triangle. That's a drop-down menu that allows you to use whichever editor isn't your default, to edit the page.