Table → Insert → Columns to the Left
Use the Columns to the Left command to add columns to an existing table. Select the column in a table that the new column should appear to the left of. To insert more than one column, select an equal number of existing columns before executing the command (Figure 10-8). If a table has uniform column width before inserting extra columns, any additional columns cause the original columns to shrink so that all the columns, new and original, have the same width.
Figure 10-8. Inserting two new columns to the left of two existing columns
To select a column, drag through it with the pointer or point just above the column and, when the pointer turns to a small arrow, click. To select multiple columns, drag this arrow to the left or right to select the additional columns. Both of these selection techniques work with rows, too.