When you create a table of contents in Word, you can customize the way it looks. For example, you can select how many heading levels to include and whether to show dotted lines between the entries and the page numbers. You can also change the formatting of the text, and Word will keep that formatting no matter how many times you update the table of contents.

If your document already includes a table of contents, these steps will replace it.

1. Click References > Table of Contents > Custom Table of Contents.

2. Make your changes in the Table of Contents dialog box. You’ll see what they look like in the Print Previewand Web Preview areas.

• To add a dot leader, or dotted line, between each entry and its page number, click the Tab leader list and then click the dotted line. You can also choose a dash leader.
• To change the overall appearance of your table of contents, click the Formats list, and then click the format that you want.
• To change the number of levels displayed in your table of contents, click Show levels, and then click the number of levels you want.

3. Click OK.

Format the text in your table of contents

To change the formatting of the text in the table of contents, change the style for each level in the table of contents.

These steps replace your table of contents with a customized one.

1. Click References > Table of Contents > Insert Table of Contents.
2. In the Table of Contents dialog box, click Modify. If the Modify button is grayed out, change Formats toFrom template. 

3. In the Styles list, click the level that you want to change and then click Modify.
4. In the Modify Style dialog box, make the formatting changes that you want, and then click OK.
5. Repeat steps 3 and 4 for all the levels that you want to display in your table of contents.

Word will remember these customizations each time you update the table of contents (References > Update Table).

Via Microsoft