Properties
Enter the element type's name, key name, and a brief description. The key name should be a unique, one-word identifier If the element type represents a document page or is allowed to create a relationship with a story or media document, select the appropriate checkbox. If the element type is a story type or media type, and you want it to have a fixed URI (usually meaning that only the category URI makes up the document URI), select the Fixed checkbox. The Type indicates the type of element type, which is one of Story for story types, Media for media types, or Subelement for subelements. Media type elements can also be one of three subtypes, available in a select list: Audio, Image, Video, or Other Media.
Group Memberships
Groups determine the permission that users will have to read, edit, or create elements types of this kind. Select a group from the Available Groups list and click the Add to List button to add it to the Current Groups. You can remove a group from the Current Groups by selecting a group and clicking Remove from List. If you are creating a new element type, click the Next button to continue. This will bring you to the full element type profile.
Sites
Top-level element types (story and media type elements) can be shared among several sites. This section won't be present for non-top-level elements or if Bricolage manages only one site. The Sites section allows you to add or delete sites from the element. You can also select the primary output channel for each site—if there is more than one output channel.
Existing Subelements
Element types really define container elements that contain other elements as well as fields. To add subelements to an element type, click the Add Subelement button to bring up the Choose Subelements screen. Use the Search box as usual to select all or a subset of the available subelement element types. Naturally, the element types you can select won't include top-level elements. To add element types, select their corresponding Add to Element Type checkboxes, then click Add Elements; if you decide you don't want to add any subelements element types, just leave all the checkboxes unselected and click Add Elements. This will bring you back to the element type profile.
Custom Fields
Fields are where content is stored. Along with subelement element types, these define the structure of an element type. In the Custom Fields section you can edit the default value for the listed fields and reorder them by selecting a number from the popup menus. To edit a field, click the Edit link. This will bring you to the Field Type Profile, where you can change anything about the field except its key name Finally, to delete a field, select the Delete checkbox and click one of the Save buttons at the bottom of the screen.
Add New Field
This is where you add new fields to the Custom Fields section. First, choose the widget you would like to use from the group of radio buttons on the left. The fields required for the management of that widget will be displayed in the rest of this section. These fields are explained in detail on the Field Type Profile Help Page

When finished, click Save, or click Save and Stay to save but continue editing the Element. Clicking Return will bring you back to the Element Type Manager without saving your changes.