I just got in some 11x14 paper and I'm having some issues. When I setup my image to print with a small border it looks fine. Once i click "print" i get the window prompt saying some areas will be clipped. I then click on show printable area and the right side of my image is now shaded. What does that shaded area on my image represent? I'm afraid if i print the image like this it will have a much larger non-printed border on the right. My image is cropped to 11x14 and the custom paper size is 11x14. I've attached a few screenshots...
Your printer requires a larger border than you are providing. In fact, it seems you have no border at all. There is a minimum border necessary for your printer so you can't print 11x14 on 11x14 paper. And you will find that the tailing end of the print requires a slightly larger border than the top and sides as the printer needs to hold on to the bottom to keep the paper from moving during the printing.
Check your page set up first to see the required borders for your printer.
Alternately, if you're using photoshop, select "center" for the print position, and in the print dialog box decrease the size of the print until you can fit it onto the page without clipping. You can do this by changing the size (for example change 100% to 95% or so), or you can use the mouse to change the size of the print by grabbing the corner of the "Print" in the dialog box and dragging it until the image fits in the allowed printing area.
So, there is no need to add the border to your original file, just do this in the print dialog box.