As in MS Excel then in an existing table in Ms Word is also almost the same use, you bia set the width, height, and how many cells you need.
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How to Create a Table in MS Word.
1. The first open your MS Word.
2. enter the Tab Insert > Table
3. will appear boxes much you The High pulled out to determine how many columns you need.
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4. well now you have your own table and you can change at will