Node Graph

Node creation

Action Shortcut/gesture
Show node menu Right click
Show node search menu Tab
Insert Dot Right click on connection, insert dot...

Selection

Action Shortcut/gesture
Select All Ctrl + A
Clear Selection Ctrl + Shift + A
Select node Left click
Toggle node Shift + left click
Select nodes Marquee drag
Add nodes Shift + marquee drag
Select upstream nodes Shift + Alt click
Select downstream nodes Shift + Ctrl click

Editing

Action Shortcut/gesture
Cut Ctrl + X
Copy Ctrl + C
Paste Ctrl + V
Delete Backspace, Delete
Toggle enable/disable D

Connections and Layout

Action Shortcut/gesture
Connect Left drag plug-to-plug
Disconnect Left drag connection-to-space
Connect to bookmark Right click on plug, connect to bookmark...
Insert node Left drag onto connection
Arrange (autolayout) selection Ctrl + L