You can draw a layout table inside another layout table, to create a nested table. The cells inside a nested table are isolated from changes made to the outer table; for example, when you change the size of a row or column in the outer table, the cells in the inner table don't change size.
You can insert multiple levels of nested tables. A nested layout table cannot be larger than the table that contains it.
Note: If you draw a layout table in the middle of your page before drawing a layout cell, the table you draw is automatically nested inside a larger table.

The pointer changes to a cross hair (+).
Note: You can't create a layout table inside a layout cell. You can create a nested layout table only in an empty area of an existing layout table, or around existing cells.
The pointer changes to a cross hair (+).
A new nested layout table appears, enclosing the existing cells or tables.
Tip: To make an existing layout cell fit snugly into one corner of the new nested table, start dragging near the corner of the cell; the new table's corner snaps to the cell's corner. You can't start dragging in the middle of a layout cell, because you can't create a layout table entirely inside a layout cell.