Create the Torn Paper Effect
Before we can have torn paper, we'll have to make the paper to tear. To do this, create a new Photoshop document and create a new layer. Do this using the "Layers" window that is accessible from the "Window" menu on the main menu bar.
Fill the layer with your desired color. Do this by pressing <F6> to open the "Color" window. You can also open this by clicking "Window" on the menu bar and then selecting "Color" from the options. Choose your color and then pres <ALT> <Backspace> to fill your layer.
Next, click "Filter" on the main menu bar and then click "Noise" and choose "Add Noise." Leave the "Amount" set to "12.5%."
Now, return to "Filter" on the menu bar, but select "Blur" and then "Gaussian Blur." Set the radius to 3 pixels. You can change this to accommodate your preference.
You now have a nice piece of blue cotton scroll paper.
Now grab the "Rectangle Marquee" tool to define the actual area of your paper.
Now, use the "Lasso" tool from the toolbox to define the section that you want to tear away. Hold the <Alt> key down while drawing with the "Lasso" tool to create a selection to subtract from your first selection.
Now, click "Select" and then "Inverse" from the main menu and then create a layer mask by clicking on the "Layer Mask" icon at the bottom of the "Layers" window.
Now grab the "Smudge" tool from the toolbox. Be sure to turn the "Finger Painting" option off.
Now, rub the torn edges with the smudge tool to give the edges you have defined to give them the torn paper look.
Finish up the Photoshop torn paper effect by adding a shadow effect. To do this, click the paper layer to select it. Next, click the "fx" icon on the "Layers" window to add a layer style. Choose the "Drop Shadow" option. Change the settings as necessary and then you are done.
Now that you know how to use Photoshop to create a torn paper effect, you can adapt the principles found in this Adobe Photoshop tutorial in a variety of ways to enhance your everyday work.