1. Open the Word document, and the editing page of the Word document will appear. Click "Insert" in the menu bar, as shown in the figure below.

2. In the Insert function module, click the Table button below to insert a table of any size, as shown in the following figure.

3. Click on the sign in the upper left corner of the form and select the whole form, as shown in the figure below.

4. Click the drop-down list button in the design sub-module of the form tool in the menu bar, as shown in the figure below.

5. In the Word table style that appears, find and click any "three-line table style", as shown in the following figure.

6. Set the three-line table style of the table, and then click Save word document, as shown in the figure below.

Microsoft Office Word is a word processing application of Microsoft Corporation.

It was originally written by richard brodie in 1983 for IBM computers running DOS. Subsequent versions can run on Apple Macintosh (1984), SCO UNIX and Microsoft Windows (1989) and become a part of Microsoft Office.

Word provides users with tools to create professional and elegant documents, which helps users save time and obtain elegant and beautiful results.