You can also not create new built-in shelves or shelf items. You can view the source code of built-in shelf items through the UI, but you can't modify that source code or delete the items or the shelves they are contained in. The shelf item scripts that correspond to shelf items in built-in shelves are loaded from internal Katana resource directories. In Shelf Actions pop-ups, their names are shown with an (App) prefix. Types of Shelvesīuilt-in shelves contain pre-defined shelf items that ship with Katana releases. Likewise, the shelves and shelf items listed in the Shelf Actions pop-up of the Scene Graph tab are considered to be dedicated to working with the scene graph. The shelves and shelf items listed in the Shelf Actions pop-up of the Parameters tab are considered to be specific to the type of node that is edited, but this is not enforced: you are free to perform any operation available through Katana APIs or provided by external libraries. The widgets toolbar for a node that is edited in the Parameters tab. The toolbar next to the main menu bar in Katana's main window.The shelf items that are available for you to run from Katana's UI are listed by shelves in the Shelf Actions pop-ups that are shown when clicking the Shelf Actions toolbar buttons, which appear in different types of toolbars in Katana's UI: This section explains how they can be run from Katana's UI, what types of shelves there are, and where the folders and script files that define shelves and shelf items are located. Shelf Item Scripts can use Katana's APIs, like the NodegraphAPI, to access various parts of Katana that can be queried or modified, for example a project's node graph, with its nodes, parameters, ports, and connections. Shelf item scripts implement Shelf Items, which are grouped into Shelves. Shelf Item Scripts are Python scripts that you can run from Katana's UI in order to perform arbitrary operations using Katana's APIs.
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