Thx very much...but I'm an English speaker - not sure what language you guys are speaking
On a more serious note: I tired the bottom margin change and changed the tag from calibre to calibre1 after a cut and paste. This seems to have done the trick and it looks like it should in my Kobo.
Why did it look right in the calibre ereader but NOT in the Kobo?
How do the heading icons in sigil relate to what's in the style sheet (that is, how to I know what style sheet listings are for H1, H2, H3, P etc??