STG configure graphviz with proper default values

misc/iv.st

@@ -5,12 +5,15 @@ interface_view(arrsFunctNames, arrsConnections) ::= <<
 # Save this output to file.dot and run "neato file.dot -Tpng -o out.png"
 
 digraph interfaceview {
-<arrsFunctNames: {each|    <each> [shape=box, label="<each>"];}; separator="\n">
+    overlap=scale;
+    splines=ortho;
+    sep=0.2;
+<arrsFunctNames: {each|    <each> [shape=box, style=filled, fontsize=36, margin=0.8 label="<each>"];}; separator="\n">
 
 <arrsConnections; separator="\n">
 }
 >>
 
 connection(sFrom, sTo, arrsMessages) ::= <<
-    <sFrom> -> <sTo> [label="[<arrsMessages; separator=",\n">]"];
+    <sFrom> -> <sTo> [fontsize=20, color=blue, label="[<arrsMessages; separator=",\n">]"];
 >>