

1. How to install the Duotone Actions?


Simply double click the Duotone Actions style and it will open inside your Photoshop.

or 

open the Actions panel inside the Photoshop, 
navigate to small list icon at the top right of the panel,
then select Load Action and find the Duotone Actions atn file within your folder.


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2. How to use the actions?


Simply put any image into the photoshop, open Window > Actions, and open the 'Duotone Actions' folder inside the Actions panel.
There are should be 7 different actions inside the folder that are ready to use. Simply select any style and click the Play icon below the panel.
That's it!