Reduce space between title and top of the page

[Jefferson dos Santos Felix]

here is the code:

%%%%%%%%
\version "2.8.0"
\paper
{
    #(set-paper-size "a4")
    top-margin = 0.7\cm
    
}

\header
{
    title = "Title"
    composer = "Composer"
    meter = "Meter"
}

\score
{
 \relative
 {
  c''1 c2 c4 c \break
 }
}

\layout {}
%%%%%%%%%%%

The problem: I can't reduce the top-margin. The source above produces a
incorrect distance between the title and the top of the page (it's
larger than 0.7 cm).
 I tried to read manual about page layout and page settings, but I
can't reduce the top margin. How can I reduce this space??? 


Thanks,

-- 
Jefferson dos Santos Felix
-----------------
felixmusic.net