Houdini 20.5 Reference Windows
This window allows you to delete the preset parameters of a node. To access this window, click the 
gear button in the parameter editor of a node and select Delete Preset.
Preset Name
Choose the name of the preset you want to delete. All saved presets for that node will appear in the drop-down menu.
Delete From
The path where the preset is saved.
Accept
Deletes the preset.
Cancel
Closes the window without deleting the preset.
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.