|Keyboard Shortcut||Menu Shortcut||Menu Location|
|Shift+T||Alt+R, T||Raster -> Threshold|
The Threshold command divides a color or grayscale image into black and white areas, based on the brightness of each pixel. Pixels that lie at or below the threshold brightness are colored black; those that are above the threshold brightness become white.
The level adjusts the brightness value that a pixel must exceed to be colored white.
Enable Real-time Preview
Check this box to see the results as you change the Level setting.