Duplicate enables you to duplicate a group of selected objects in a tabular format. The duplicate dialog asks you information as to number of rows and number of columns in which the duplicated objects will be arranged. You will also be asked to specify column and row gap so as to offset each row of objects by this gap and each column by the column gap.

Note that duplicate treats the selected objects as a group and while duplicating calculates the outer bounding rectangle of this group of objects.