Subtitles in tables of contents

Hello

What version of Word are you using?

If you've created an automatic table of contents using heading styles 1, 2, 3..., press Alt F9 to display the field code of the table of contents
You should have a field that looks like this {TOC \o "1-3" \h \z \u } where "1-3" shows the levels of headings and subheadings, 1 for style 1, 2 for style 2 (subheading), etc...
Modify it according to the number of subheadings to be displayed
Re Alt F9
And update the TOC

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Argitxu