Constructing a tree in LaTeX

Question

I am having real trouble creating a tree. So far I have

\documentclass{article}
\usepackage{tikz-qtree}

\begin{document}

\begin{tikzpicture}[every tree node,
   level distance=1.25cm,sibling distance=1cm,
   edge from parent path={(\tikzparentnode) -- (\tikzchildnode)}]
\Tree
[
    \edge node[auto=right,pos=.6] {$A$};
    [.1
       \edge node[auto=right,pos=.8] {$B$};
       [.2 ]
       \edge node[auto=left,pos=.8] {$C$};
       [.3 ]
        ]
    \edge node[auto=left,pos=.6] {$D$};
    [.4 ]
]
\end{tikzpicture}

\end{document}

which produces

However, I want to have two more layers, from 2 I want another 2 branches, and from the left of these branches I want another. Also how does one put a label underneath the numbers I have used?

Thank you very much and I hope I am clear

Answer 1

I'd suggest you to use the powerful forest package instead; it's more versatile, it has a lot of built-in features to customize trees and will give you shorter code. A simple example showing multi-line nodes:

The code:

\documentclass{article}
\usepackage{forest}

\begin{document}

\begin{forest}
for tree={
  l sep=30pt,
  parent anchor=south,
  align=center
}
[
  [1\\some text,edge label={node[midway,left]{A}}
    [2\\some text,edge label={node[midway,left]{B}}
      [4\\some text,edge label={node[midway,left]{C}}
        [6\\some text,edge label={node[midway,left]{D}}
        ]
        [7\\some text,edge label={node[midway,right]{E}}
        ]
      ]
      [5\\some text,edge label={node[midway,right]{F}}
      ]
    ]
    [3\\some text,edge label={node[midway,right]{G}}
    ]
  ]
  [8\\some text,edge label={node[midway,right]{H}}
  ]
]
\end{forest}

\end{document}