Vertical spacing within header blocks

[Hilary Snaden]

Is there a way of adjusting the vertical spacing within a header block? 
After increasing the size of the title text, so:

title = \markup { \fontsize #5 "Suite" }

but I now need to slightly increase the spacing between the title and 
subsequent text and the dedication text above it. So far I've found no 
references to how to do this.

--
Hilary Snaden