Word - Insert Contents

Problem: Indexing doesn't work with Heading option

Select the text you wish to appear in Table of Contents
Press SHIFT ALT O (letter "o")

Select number 1 in Level for main heading, sub headings as 2 etc.

After selecting all headings, it is necessary for them to appear in Table of Contents to:

Insert - reference-
Index and Tables
Table of Contents
Options
in Table of contents remove
Styles and outline,
select:
Table entry fields