|Shell UI component|
|Header||The highest level of navigation. The header can be used on its own for simple products or be used to trigger the left and right panels.|
|Left panel||An optional panel that is used for a product’s navigation.|
|Right panel||An optional panel that shows additional system level actions or content associated with a system icon in the header.|
The right panel is invoked by icons on the right side of the header, and remains anchored to that icon. Right panels have a consistent width, span the full height of the viewport, and are flush to the right edge of the viewport.
Note that the switcher also lives in a right panel.
A switcher item is anything that changes what product, offering, or property occupies the UI shell. Consider moments in a product when you switch from a calendar to a mailbox, from Kubernetes to Catalog. These items belong in the switcher.
A switcher divider groups similar switcher items. You can use a divider to set apart a parent domain, group child domains similar in hierarchy to the parent, and set apart additional resources. The divider should not be used to separate every switcher item.
The far right header icon is reserved for the switcher icon. The switcher icon and the switcher panel should only be used together.
Right panels always float over page content, and always remain anchored to their associated icon. You can have multiple right panels, but only only one can be expanded at any time.
Once expanded, the panel’s associated icon is outlined, with its bottom border flowing into the panel. To dismiss the panel, a user must select an item, or click or tap the header icon.
There is no selected state for right panel items. Even if a user is currently within one of the panel items, the item remains unselected.