Hoe to create crop marks for printer?

[bythecshore]

I've designed a postcard and am ready to send to a printer. I've added some extra bleed around the edges and now I want to add crop marks to show the actual print area.

Does anyone know how to do this? Thanks. 

[Glenn 8675309]

Check with the printer first to see if they automatically crop images at the typical 1/8th inch bleed line, you may not have to bother with doing it.   My advice: always assume that's the case with any image you send for printing.