# How do I modify the amount of space between the heading and the chapter's number and/or name?

Currently, the space between the bottom of my header and the top of the chapter number is quite large and I would like to be able to reduce the space between the header and the chapter number. How would I go about doing this?

I am using the report documentclass.

\usepackage{titlesec}

\titleformat must be specified in order for the spacing to take effect.
You could also use the \vspace command. For example, \vspace{-2ex} means "move the stuff immediately following up 2 lines worth of vertical space". (1ex is is the height of a line in the current font).