Text and logos should not be positioned too close to the edge of an ad (trim edge). This is to avoid text and logos from getting cut off in case of shifting in the trimming process of pages.
Text, logos and other essential elements should not be positioned 5 mm closer to the trim edge. If possible, up to 10 mm of space should be left around the edges.
Lines and frames should likewise not be positioned at the trim edge or close to the edge. Thin frames may get cut off, and in the case of thicker frames, the frame on the other side may be visibly thicker or thinner than on the other side due to shifting in trimming.