Window/Level

Activating W/L Tool

Click the W/L button in the toolbar to activate the window/level adjustment mode.

With the W/L tool active, click and drag on the viewport:

Drag Direction	Adjustment
Left / Right	Window width (contrast)
Up / Down	Window level (brightness)

Click the Reset button to return to the default window/level values.

Activating W/L automatically deactivates Pointer and Ruler tools. Only one interaction tool can be active at a time.