1 copy mode. 2 Set the width and width of the sketchpad to 3 times of the pattern, and paste the pattern. Turn the picture left and right in the edit menu, and splice two pictures left and right. Four pictures are synthesized and copied. Flip the picture vertically in the edit menu and splice the two pictures up and down to delete the overlapping part. When overlapping, you can set a little transparency on the upper layer to align the pattern, and then adjust the transparency back. 5 finally, synthesis.