If you have any element(s) of your design that you would like to have repeated, whether they are images or text layers, you may do so utilizing the 2X Duplicate option from the Objects panel in the design work space (pictured below). You may utilize this function as many times as desired to obtain your desired effect.
Please note: If you are attempting to just get a tiled or patterned image, it is not necessary to duplicate the content over and over and manually place it into position. See (How do I tile an image?) for information on tiling a design.