Subheaders and Subtotals are used to split a project into sections.
To insert them into your project, right click an item in the spreadsheet.
Select subheader or subtotal and then move it into position using the up and down keys in the menu bar. You can also change the subheader name by clicking on the text in the spec column. The subtotal will be prefixed with the text in the subheader on the printed quote.