In the Style Toolbox of Word Start Menu Bar, right-click the desired title style and select Modify, as shown below:

Then click the format button in the lower left corner of the pop-up dialog box and select a number, as shown in the following figure (the font size, color and thickness of the title can also be modified in the format bar in the middle of this dialog box):

In the pop-up dialog box, select the desired number format. If there is nothing you need, click on the bottom left to define a new number format, as shown in the figure below:

Then modify the number format column and modify the alignment in the column below it, as shown in the following figure:

Click OK, and then select the number format you want to confirm. The format settings of the second-level title and the third-level title are the same as this operation flow. Note: Heading 1, Heading 2, Heading 3, ... In the style property box in the Word start menu bar, refer to the first, second, third and ... headings respectively!

To change the line spacing of the title, you can follow the first step, and then click the paragraph format button at the lower left to change it, as shown in the following figure:

After setting, click the left mouse button on the line where the title needs to be set, and then click the left mouse button on the required title style in the Word Start Menu Bar Style Property box to set the document title as needed.

Method 2

You can define a new multilevel list by selecting the multilevel list in the paragraph tool box in the Word start menu bar. As shown in the figure below:

When choosing this method, pay attention to click the button at the lower left and pay attention to the corresponding level. As shown in the figure below:

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