We will improve the library_checkout module we have been working with to add the Kanban view to the library checkouts.
For this, we'll use a new data file, library_checkout/views/checkout_kanban_view.xml. We need to edit the data key in the __manifest__.py  descriptor file to append this new data file at the end of the list.
In library_checkout/views/library_menu.xml, we can find the window action used in the checkout menu item. We need to make a change to it to enable the additional view types we'll add in this chapter:
<act_window id="action_library_checkout"
name="Checkouts"
res_model="library.checkout"
view_mode="kanban,tree,form,activity,calendar,graph,pivot"
/>
Here, we modify the menu action to include kanban at the beginning of the view_mode list...