25.15.6 Table Rows and Columns
M-x table-insert-row
inserts a row of cells before the current
table row. The current row, together with point, is pushed down past
the new row. To insert a row after the last row at the bottom of a
table, invoke this command with point below the table, just below the
bottom edge. You can insert more than one row at a time by using a
numeric prefix argument.
Similarly, M-x table-insert-column
inserts a column of cells
to the left of the current table column. To insert a column to the
right side of the rightmost column, invoke this command with point to
the right of the rightmost column, outside the table. A numeric
prefix argument specifies the number of columns to insert.
M-x table-delete-column
deletes the column of cells at point.
Similarly, M-x table-delete-row
deletes the row of cells at
point. A numeric prefix argument to either command specifies the
number of columns or rows to delete.