Archive Content Type
With Freelancer you can easily set the post archive content type through the Theme Settings admin page. Simply select either "Full Content" or "Excerpts", and then if "Excerpts" has been selected, be sure to tweak the "Archive Excerpt Length" as needed (default is 55 words). And finally, you can decide whether or not you want an "Archive Featured Image" to display with your Archive Content. If you choose to enable this option you will then be presented with the ability to also tweak the "Featured Images Size" and "Featured Image Alignment".
So just to be clear, the "Full Content" type will simply display ALL of your content in the archive pages (unless restricted through the post editor), while the "Excerpts" type will display only the excerpts, further controlled by the "Archive Excerpt Length" option.