The BBox's label can be a string or it can be another view, such as a control. For example, a popup menu might be used as the BBox's label, to let the user select a group of options to view in a preference panel:
| Field | Type code | Meaning |
|---|---|---|
| "_frame" | B_RECT_TYPE | The BBitmap's bounds rectangle. |
| "_cspace" | B_INT32_TYPE | The color_space of the data. |
| "_view_ok" | B_BOOL_TYPE | Always true, indicating the BBitmap accepts views (only present in deep copy archives of BBitmaps accepting views). |
| "_data" | B_RAW_TYPE | The bitmap data (present only if "_view_ok" not present). |
| "_continguous" | B_BOOL_TYPE | Whether the BBitmap requires memory in one contiguous chunk. |