First, delete rows and columns
Ways to delete rows and columns you can do this by using the Table menu bar. First select the row or column you want to delete, and then select the Delete row or column in the Table menu bar, or you can use the Delete row or column button on the table and Border toolbar to complete it.
Second, add rows and columns
There are also two ways to add rows and columns, one of which is done by the Table menu bar, where you have to choose where you want to insert the table rows or columns.
The above is about word2003 Delete, add rows and columns of methods, if you want to more intuitive learning, please watch the following GIF animation learning it.