Duplicate
Delta
Delta will make a copy according to the delta X and delta Y values from the original copy. Click on the Delta icon to open the delta menu.
Enter the Delta X and Delta Y values and click OK to make a copy.
Array
Array will create an array of the selected pattern, removing common lines.
The result will be a single pattern. It will replace the original. If you want to preserve your original pattern, make a copy before using this tool.
Although it will work for any pattern, the most common use for this tool is for creating grids of rectangle patterns.
Mirror
Click the Mirror icon to open the mirror menu.
You can create a mirrored copy by clicking on one of the arrows from the popup window.