How to switch from Chapter to Annex numbering midway thru a large.

[OwlCat1212]

How does one get both Chapter numbers and Annex numbers to coexist in a
single document?

My chapters are numbered 1,2,3 ... with subsections 1.1, 1.1.1, etc. Tables
and Figures within the chapters include the chapter number (e.g., in chapter
3: 3-1, 3-2, etc.)

Then I get to the annexes and want the rest of the document to be numbered
Annex A, A.1, A.1.1, etc. And I want figures and tables in the annex to be
labeled A-1, A-2, B-1, etc.

I've tried several ways to insert section breaks, start new lists, change
multilevel numbering schemes, etc., but it always messes up the Chapter
numbering as well, either changing all the chapter numbers to letters (A, B,
C, ...) or causing the chapters and all subsections to lose their numbers
entirely.

TIA

 

[Stefan Blom]

See http://www.shaunakelly.com/word/numbering/NumberingAppendixes.html.