The Houdini Network Editor

Found in the bottom right of the Houdini window:

As we create objects nodes for them appear in the Network Editor:

Note: Pan and zoom controls work within the Network editor to make navigation consistent with navigation the viewport.

We can zoom right into one of our nodes:

The green and blue bars represent a couple of view and selection options which can be toggled on and off.

Green: Selectable, toggles whether the node object can be selected.

Blue: Visible, toggles the visibility of the object in the viewport.

Colour Coding Nodes

Pressing ‘c’ on the keyboard while in the Network Editor displays a colour pallet, this little tool is useful for organising your scenes as you can apply a set colour to any of the nodes in the editor.

To apply a colour, drag + select the node, then click on the chosen colour in the pallet:

Grouping Nodes

Drag and select 2 or more nodes in the network editor.

In the toolbar click on the ‘Create network box’ button:

The relationship between the 2 nodes in the editor is then represented by a grey box:

As with individual nodes you can also apply a colour to the new group, select the group box and press c on the keyboard to open the colour palette, then select the desired colour:

Adding Notes

You can add sticky notes directly in the Network editor by simply clicking on the sticky notes icon.  Then click in the note to add text:

Shape Palette

Clicking the shape palette icon reveals the shape palette:

Selecting a node in the editor and clicking a desired shape in the shape palette will change the shape of that node: