You can view the Wiki without being logged in but you must Log In to author a page. Click the person icon in the upper right.

Enter the credentials Schelsea has shared to you

Now that you’re logged in you are able to see the New Page button in the top right. Click the New Page button.

In the New Page dialog :

If you see this error:
This is because spaces are not allowed in the machine-friendly URL path. Edit this path so it uses “-” in place of space.
Pages can be authored using 3 different editor tools so chose the one you like the best (Code, Markdown, or Visual Editor).

In the Page Properties dialog populate the user-friendly page title, a meaningful description, and set the tags to include “how-to” if you’re writing a How-To or set the tags to include “reference” if you’re writing a reference. Do not invent your own new tags.

Edit the page content in the editor and click Create Page when ready.

After the page is created you can also Edit it further by hovering over the Page Actions button and clicking Edit. This will return you to the editor.
