[Before diving into Portfolio Projects we strongly recommend you to get accustomed with Blog Posts]

To create a project navigate to “WP-admin > Portfolio > Add new”.
In addition to all standard stuffs like header options and widgetized areas, Portfolio project back-end interface has “Project Options” tab (fig. 1):

Fig. 1. Project settings.

Here, you can configure:

• specify a link for the “Back” button (more info is available here), different to the one pointed in Theme Options -> Post Types;
• add external project link (fig. 2.1-2.2), its caption and target (this is useful for web-dev studios);
  

  Fig. 2.1. Project link on a single post page.

  

  Fig. 2.2. Project link on Portfolio posts feed page.

• hide featured image on a single project page;
• enable lightbox for this image on a single project page;
• select categories for related projects (fig. 3):
  

  Fig. 3. Related projects.

• choose post preview width on portfolio page: normal or wide (fig. 4):
  

  Fig. 4. Post preview width.

Finally, there is such a legacy feature as “Project Media”, which can be enabled through The7 -> My The7. But it is meant to be used by buyers who started building a website with older generations of the theme.