Apache OpenOffice Community Forum

I mainly use OOoWriter to create e-books, converting them via Calibre is real easy.
Calibre uses the styles (Headings 1, 2, 3) to create a table of contents. Now, I'm making a book (copied lots of text from a webpage) and I've mis-applied the headings: they're all H1 instead of H3, meaning Calibre will mis-arrange the chaptering hierarchy, new page cut offs, etc.
Could anyone tell me how I select allstyles of H1, to convert them to H3?

Find and Replace has an option to search for styles.

Normally with any books (print on demand) and ebooks, chapter headings should he H 2 I have found. Another way to change them, though slower is to simply highlight the heading, and right click and select heading style from the list.