Transform > Zero Transforms Resets any scaling, translation (movement), and rotation applied to the picked objects.
Transform > Place Tool Positions an object based on input points (or existing construction planes) on both the source object and the target location.
Transform > Arrays > Array Creates arrays of objects, either linearly or radially, from duplicates of an original object (or set of objects). Options let you create various patterns. This tool is useful when modeling objects such as grills, speakers, wheels.
Transform > Arrays > Path Array Duplicates one or more objects and places the copies at equal distances along one or more curves, creating stitch patterns.