Find a Perfect Image

Ok first you want to browse around on google trying to find a perfect image of a printer. Unfortunatly the one I found already had paper coming out of it. So you can use this below or try and find a picture without the paper.

Drop Shadow

Ok well we need to start off with a drop shadow. Select the Single Row Marque Tool and make a selection just right where the paper will be coming out:

Now create a new layer. Fill the line in with any color. I used black for now.

Blending Options

Right click the new layer and go to Blending Options and set a drop shadow setting.

There ya go!

Remove the Drop Shadow

Select the Rectangular Marque Tool and remove the drop shadow accordingly:

Polygonal Lasso Tool

Make a new layer. Make a selection with the Polygonal Lasso Tool:

Grab your Paint Bucket Tool and fill it in with a off white color.
Right click the layer and go to Blending Options Apply these drop shadow settings:

Make Drop Shadow

You want to make sure your paper layer is under the line with the drop shadow layer. Or there will be no drop shadow on your paper like below:

Graphic onto the Page of Your Printer

Open up a graphic you already made. Size it to the size of the paper. Now your graphic onto the page of your printer: