自循环边在graphviz中太短且难看

我用graphviz画了一幅画。请看。 我认为它很难看，因为自循环边很短。 边的属性“minlen”对我不起作用。 我尝试了节点的几个端口，但除了我当前的实现之外，所有的端口都显示出混乱。你有什么好主意给我吗？ 代码如下：

digraph finite_state_machine {
rankdir=LR;
size="8,2"
fontname="Verdana"
node [shape = doublecircle]; Idle;
node [shape = circle,nodesep = "2.0"];
Working:s -> Working:s [ label = "response[j]?" ,minlen = 50000];
Idle -> Working [ label = "boot" ];
Working:n -> Working:n [ label = "sendtx[i]!",minlen = 50000 ];
Working:e -> Working:e [ label = "qry!" ,minlen = 50000];

---

}

添加

nodesep=1使循环更大，尽管不是更好。因此，这将有助于：

digraph finite_state_machine {
  rankdir=LR;
  size="8,2"
  fontname="Verdana"
  node [shape = doublecircle]; Idle;
  node [shape = circle,nodesep = "2.0"];
  Working:s -> Working:s [ label = "response[j]?" ,minlen = 50000];
  Idle -> Working [ label = "boot" ];
  Working:n -> Working:n [ label = "sendtx[i]!" ];
  Working:e -> Working:e [ label = "qry!"];
  nodesep=1;
}

将产生类似于：

还有，字体属性对我不起作用。我在windows中使用graphviz。我尝试将/etc/fonts/fonts.conf修改为：C:/Windows/fonts