You can add or delete columns to change the structure of a table to accommodate more or less information.
When you add columns, Word decreases the size of the other table columns to accommodate the new column.
Click in the column to the left of the column you want to add.
Click Table.
Click Insert.
Click Columns to the Right.
Word inserts a column in the table to the right of the column you selected and selects the column.
Click in the column to add text to it.
Click anywhere in the column you want to delete.
Click Table.
Click Delete.
Click Columns.
Word removes the column and any text it contained from the table.
Word does not resize existing columns to use the space previously occupied by the deleted column.
Is there a way I can easily enlarge a table to fill up the space between the left and right margins after deleting a column?
Yes. Follow these steps:
Click anywhere in the table.
Click Table.
Click AutoFit.
Click AutoFit to Window.
The table content and columns readjust to fill the space.