Editing a Node Input with the Node Properties dialog

Select a node in graph view and double-click on it.
The Node Properties dialog opens.
Expand and navigate in Technique properties group and select the input ports you want to edit.
Clicking in the value field highlights the port field.
Input a value to revise. The Apply Changes tool icon enables.
Click Apply Changes to effect the edits to the node.
The node has been updated with the view.