Why is heading not numbered?

Head3.odt (15.2 KB)
In Head3.odt, the Heading 3 is supposed to be numbered 0 according to Tools>ChapterNumbering. Why is it not?

Because you have a bad mixture of style formatting and direct formatting. If I clear direct formatting with Ctrl+kbd>M, the numbering reappears.

BUT, you also messed up indents which makes Writer crash as soon as I try to further edit the sample file.

When a paragraph is numbered (or bulleted the same), indents are taken over by the associated list style, be it Format>Bullets & Numbering or the toolbar button. You must in no circumstance set indents in the paragraph style; leave them at 0. Otherwise your document becomes unstable and Writer may crash. If it doesn’t crash, formatting will anyway be erratic. (I know, I tried. I wanted very sophisticated layout. Even right indent doesn’t behave like I expected.)

In a numbered paragraph (and chapter numbering is just another instance of numbered list), you can customize left indent in the Position tab.

Remarks:

  • Avoid negative indents sending text into margins. Margins are supposed to be non-printing areas.
  • Avoid long inheritance chains for styles as you did for the Heading n family. There doesn’t seem to be any rationale in your design decision. It only complicates style maintenance.
    Dependency makes sense in the Heading n family when you use relative font sizes (in % units) so that Heading or Heading 1 define a base size and all other Heading n scale proportionally. Here you didn’t use the %-sizes and you have a complicated setting for the other attributes.
  • What have you done in your document?
    When I try to access Tools>Chapter Numbering I get a totally different Position tab where the parameters and wording are completely different from my usual dialog. I checked that on a simultaneous blank document, I recover to my usual configuration.
    I didn’t see any macro which could be responsible for it.
    This could also explain part of your problem.