You can drag and drop
objects from one cell in the layout grid to another.
If you attempt to drop
a new object into a cell that already contains an object, then a warning
message appears. If you click OK, then the
current object is replaced by the moved object.
If you attempt to move
an existing object into a cell that already contains an object, then
a warning message appears. If you click OK,
then the current object switches places with the moved object.