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Dear gurus,

I have to prepare a file where a pattern repeats seamlessly. The pattern I'm using is already fixed so that I just need to place the repeating "tiles" next to each other. What I should do is to make a file where the pattern is repeated three times (horizontally aligned). The width of the final work should be 150 cm, and there should be a white margin of 1 cm on one side and another of 2 cm on the other side (so that the width of one "tile" in the pattern is 49 cm). There are two layers in the document I have, one colour on each of them, and I should have it the same way in the final file. How should I proceed? I've been looking for tutorials on this matter, but haven't found anything really helpful...

Thank you in advance for your kind help!