Photoshop Tip: Quick duotone effect
Tips & Tutorials, by Mark White
May 12, 2012
Here’s a very quick and easy way to create a duotone image, with the ability to experiment with colours
To quickly tone an image with one hue, create a new layer and change its blend mode to Color.
Open up the Color palette from the Window menu, select a colour, and then press Alt/Opt+Backspace to fill the image.