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After activating this plugin, you can create custom content types (post types) by using the configuration page for this plugin. Click the "Custom Content Types" link under the Settings menu or click this plugin's "Settings" shortcut link in on the Plugin administration page.

You can list all defined content types (a.k.a. post-types) by clicking on the "Custom Content Types" menu item.

There are a lot of options available when you create a new content type, only some of them are pictured.

You can define many different types of custom fields by clicking on the "Custom Content Types --> Custom Fields" link.

Clicking the "activate" link for any content type will cause its fields to be standardized and it will show up in the administration menus.

Once you have defined custom fields and associated them with one or more content types, those custom fields will show up when you create or edit a new post.