| 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.
Level
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.
Original color image
Image with threshold set to 93