Opus Primus supports all of the current built-in Post Formats that WordPress offers. The WordPress codex offers this as a description:

A Post Format is a piece of meta information that can be used by a theme to customize its presentation of a post. The Post Formats feature provides a standardized list of formats that are available to all themes that support the feature.
WordPress codex

The following is an alphabetical list of all of the Post Formats with some ideas behind how they are implemented in the Opus Primus theme:

  • Aside – Designed with the idea of writing something that may be a bit off-topic from the usual content.
  • Audio – Ideal for providing a link to music files or podcasts as an embedded link.
  • Chat – Screenplays, transcripts, or interviews presented with a font giving the flavor of an old Underwood typewriter.
  • Gallery – The index page will show a featured image from the Gallery you choose, or it will use the first image in the gallery as a default featured image.
  • Image – Imagined as a gateway to the image attached to the post with any and all EXIF details available from the image being displayed.
  • Link – A tidy bit of JavaScript wraps the link with the infinity symbol.
  • Quote – One of my personal favorite Post Formats, the content, especially entered using the blockquote tags will present a bold cursive typography that sets the post apart from all of the other content.
  • Status – Many consider this Post Format to be the equivalent of a message of less than 140 characters, where in the case of Opus Primus and how it was envisioned, one may be more accurate in considering it more along the lines of a newsworthy post.
  • Video – Ideally suited for embedded video links which will be sized to the content width via another tidy bit of JavaScript.

Each Post Format also displays a button to the far right side of the byline data indicating the Post Format type and linking to the specific Post Format’s archive. Also to note, the button text is uniquely defined depending on which Post Format is used and if it is being displayed in the index view or the archive view. Each Post Format also has a unique additional button if the post is made “sticky”.

There is a tenth Post Format but that is actually the default “Standard” format which can be used for anything you want, although it does not have a unique button indicating it is the default Post Format in use.