You can't have Heading 1 act differently in different sections but you can use Heading 1 to create a NEW style so it starts with all the same attributes and then modify the settings you want for the new purpose. Since they share the same attributes, the outline level would be the same (unless that was one of the attributes you change).

I don't know what you want to do with your subsequent sections but you would want to use the built-in headings if you wanted for instance to have the page numbers include the Heading number and show that in the TOC. With a non-builtin-heading style you can add a styleref field into the footer to do a similar thing but that won't be included in the TOC page number. Also the built-in headings can include their numbers in captions (more easily) and the cross-refs list can show a 'heading' list which.

The problem with using 1,2,3 in the first section and then 4,5,6 in the second is that it restricts you to only three sections where you can do that (because you have used up your limit of 9 in total). Plus you can't easily add a 4th heading into section 1 because you wanted it for section 2. This can drastically reduce your flexibility which is rarely a good thing.

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Andrew Lockton
Chrysalis Design, Melbourne Australia