The Window tool permits to adjust contrast and brightness of pixmap images. If the current view features multiple images, this tool affects only the one marked to be analyzed in the image composition tree.
The Window tool can also be selected temporarily or permanently by pressing
W or Shift + W, respectivelyon the keyboard.
Both contrast and brightness are adjusted by dragging with the left button of the mouse.
Contrast may be increased by dragging upwards and decreased by dragging downwards.
Dragging to the left makes the image appear darker, whereas dragging to the right makes it appear brighter.
Double-click the left button of the mouse to restore a window (setting for brightness and contrast) suitable to visualize the whole extent of intensities to be found in the image.