A pattern can easily be rotated, enlarged or shrunk. When the node tool is active, an interesting trio will appear in the top left corner:
a cross, which you can use to move the pattern
a white, circular handle that allows you to rotate the pattern.
a white, square-shaped handle, which enlarges and shrinks the pattern.
When you grab these handles with the mouse and drag them, they will affect the pattern, and the result will immediately be visible.