Go to the Pages app Control-click a cell, then choose where you want to add the row or column (above, below, before, or after the selected cell). You can also move the pointer over the number or letter for the row or column next to where you want to add, click the down arrow, then choose where to add the row or column.
Delete a row or column anywhere in the table: Control-click a cell in the row or column you want to delete, then choose Delete Row or Delete Column. You can also move the pointer over the number or letter for the row or column you want to delete, click the down arrow, then choose Delete Row or Delete Column.
Insert multiple rows or columns at once: Anywhere in the table, Resize, move, or lock a table in Pages on Mac