The position of an element in the output document can be absolute or relative:

Absolute

Absolute positioning places the element exactly where you positioned it, so if you positioned it at Column=1, Row=1, it would appear in the top left hand corner of the output document no matter what.

Relative

Relative positioning is only possible within a Loop.  Relative positioning places the element in relation to the current position of the loop. Thus on the first cycle of the loop starting at row 30, an element positioned at Column=1, Row=1 will be placed at Column=1, Row=30.  The second cycle of the loop will place the same element at Column=1, Row=31 because the loop is now on row 31.