Node properties screen
In the multi-user edition, the node properties screen is available to power users only, and can be opened by clicking "menu⁄tree⁄node properties".
The node properties contains several tools and utilities for applying icons, showing checkmarks, etc.
E.g. one can show⁄hide the checkmark of the currently selected node, or all checkmarks in the entire subtree; one can apply an icon to an entire subtree, or make an icon the default icon for the subtree; one can check⁄uncheck all nodes in the subtree.