Bleed lines ??



Im working on an landscape 300 dpi A3 image, however i just want to make sure i've done the bleed lines right. The bleed lines are 3mm so i've just added 3 mm to the default size of the A3 image and then added guides so i know where it will chop off. Oh and i'm doing this in Photoshop ofcourse.

Thanks !
sounds about right. on illustrator you would extend the images exterior lines over the threshold, but with a photo, all you can do is just lose some of the image at the edge to compensate for bleed