A story component is something that can be added to a story. The built-in story components are scenes, characters, settings, items, and plotlines. Story components generally work the same way in terms usage such as adding, editing, and deleting them. The detail screens also follow the same convention with primary data in the center, story navigator sidebar on the left, and component metadata sidebar on the right. This latter sidebar is also where you can add tags to the component. While it seems silly to call a story a story component, it is indeed one in terms of usage and layout. In other words, all types of story components follow the same conventions.
Available in Hiveword Plus, a custom type is a story component that you define, similar to the built-in type of scenes, characters, etc. For example, you can track Spaceships, Religions, or anything you want. Each custom type has custom fields for you to capture specific data for the type. Like any story component, you can add instances of custom types to your stories. Learn more about custom types.
Custom Field / Extension Field
Available in Hiveword Plus, custom fields and extension fields are synonomous where one term is used over the depending on context. Custom types (defined above) have custom fields that you create for capturing specific information such as Description, Color, Range, etc.
Extension fields, on the other hand, are custom fields that you use to augment the fields in the built-in types. So, if you want to add a Theme field to the Story detail screen, you would use an extension field.
Regardless of context, custom fields are defined the same way.
The Sceneboard is the primary scene list view. See here for more information.