This $$x^{2}$$ example manuscript is intended to serve as a tutorial and template for authors to use when writing their own AAS Journal articles with Authorea. The manuscript includes a history of AASTeX  and documents the new features in the previous version, 6.0, as well as the new features in version 6.1. This manuscript includes figure and table examples to illustrate these new features. Authorea features a rich text editor so that you can write in LaTeX, Markdown, or rich text and render directly on the web. Authorea supports and renders the vast majority of LaTeX notation needed for AAS Journal articles. A few features provided by AASTex v6.1. that are not available in Authorea have been listed in this document. Authors are welcome replace the text, tables, figures, and bibliography with their own and submit the resulting manuscript to the AAS Journals peer review system. The first lesson in the tutorial is to remind authors that the AAS Journals, the Astrophysical Journal (ApJ), the Astrophysical Journal Letters (ApJL), and Astronomical Journal (AJ), all have a 250 word limit for the abstract. If you exceed this length the Editorial office will ask you to shorten it.