I think the grid starts at the edge of the page size so you make it a touch bigger until it lines up.
You usually ‘select all’ and ‘resize page to selection’, but in doc properties you can adjust the margins of the page size.
I think fzbz is the whole bin, but you can right-click on a part and individually export it and it becaomes fzpz
EDIT
Holly cr@p, that’s nice.