Houdini 20.5 Reference Windows
This dialog lets you edit a script that gets run when the node is deleted.
To access this window, click the 
gear button in the parameter editor of a node and select Edit Deletion Script.
This is useful when you want to cleanup purposeless nodes after a node is deleted.
For example, if there are some CHOP nodes that drive parameters on a node, they may serve no other purpose once the node is deleted, in which case you may want to have the delete script for the node also delete the CHOP nodes.
The color editor is an expanded interface for picking colors.
Edit Node Gallery Entry window
This window allows you to edit entries in the node gallery.
Edit Parameter Interface window
Creates, imports, or edits parameters on a node.
Operator Type Properties window
The type properties window lets you edit the metadata and parameter interface of a digital asset node type.
The Package Browser window lets you list, create and manage Houdini packages.
Syntax highlighting color editor
You can choose a set of colors Houdini uses for syntax highlighting code such as VEX, Python, and USDA, or make your own syntax coloring scheme.
The Viewer Handle Browser window lets you list and manage python viewer handles loaded in Houdini.
Viewer Handle Code Generator window
Utility to generate Viewer Handle code.
The Viewer State Browser window lets you list and manage python viewer states loaded in Houdini.
Edits VOP struct data types.