Pan Canvas

Middle Click + Drag
Alt + Left Click + Drag
Shift + Ctrl + Mouse Wheel (pan vertically)
Shift + Mouse wheel (pan horizontally)

Zoom Canvas

Ctrl + Mouse Wheel
Ctrl + Middle Click + Drag

Zoom in on Item

Double-click on item
Double-click again to get back to previous view

Select Items

Single Item: Left Click
Multiple Items: Ctrl + Left Click
Rubberband Selection: Left Click + Drag

Move Selected Items

Left Click + Drag

Snap Rotation

Shift or Ctrl while rotating

Move Window

Ctrl + Alt + Left Click + Drag

Edit Text

Double Click on Text
Press Enter or click elsewhere to stop editing
Shift + Enter for newline