Now, enter the Layer Properties of the “Curl” layer.









And the results.



Now duplicate the “Curl” layer and rename the duplicated layer to “Curl Shadow”.
Remove the layer style of that layer and settle it below the “Curl” layer on the Layers Panel list.
Enter the Layer Properties and apply these settings to the “Curl Shadow” layer.



And the results.



Move that layer exactly above the “Sheet” layer on the Layer Panel list, right click on the layer and chose the option - Create Clipping Mask.



Congratulations, you’re done!