Different types can have different edit views. When you edit an Image card, for example, you get an upload button. When you edit a Phrase card, you get a small box.
Like most things in Wagn, every types itself has a card. So there is a card named "Image" and a card named "Phrase". And like all cards, these cards have a type. Appropriately enough, their type is called "Cardtype".
In many situations, adding a card will automatically prompt you with a type dropdown menu. If not prompted (because the type is implicit), you can simply create the card and then change its type. A card's default type is generally set by a *defaultrules. For newly installed Deckos, the default type is RichText.
change a card's type
Just go to the menus and select edit > type. You'll see a dropdown menu that you can click on to change the type to something else. (Don't worry; you can always change it back.)
add your own types
To create a new type, just add a card whose type is "Cardtype".
organize your data into types
There are no hard and fast rules about what kind of data must have its own type, but here are some rules of thumb:
types are often used for patterned data
data with "fields" is usually accomplished with types. For example, if you want to store descriptions and contacts for a number of organizations, you probably want an "Organization" type.
you only need special types for the fields themselves if they too are patterned In the previous example, you wouldn't need a new type for descriptions, that can be a "Basic" card.