manage-user-roles folder to the /wp-content/plugins/ directory.Go to Settings > Manage User Roles. There you will find a list of all user roles on your site (except for Administrator). For each role, you can choose whether they see "only their own content" or "all content".
By default, all non-administrator roles are set to "See only their own content" for maximum security. You can change this at any time.
This version of the plugin supports rules for seeing one's own content or all content. More complex rules are being considered for future versions.