i modified flowchart.net tree layout sample a bit.
i am inserting my objects from database

my project is a bit diffrent because each item can have more than one parent.

this is a sample of links table in my database

item1   item2
-----------------
0          1
0          2
0          3
1          4
1          5
4          5
4          2


I use this code to link them to eachother

   Box b = addChild(fc.FindBox(deviceid), r.id, title);

This is my addchild function which checks if something is inserted below and links it to appropriate box

  private Box addChild(Box node,int id, string title)
       {
           // get the group of the parent node
           Box childNode = fc.FindBox(id);
           bool newnode = false;
           if (childNode == null) {

               childNode = fc.CreateBox(0, 0, 30, 20);
               newnode = true;
           }
           else childNode = fc.FindBox(id);

           int tag = 0;
           if (node != null) tag = (int)node.Tag;

           if (newnode)
           {
               Group prntGroup = fc.FindGroup(tag);

               if (node != null)
                   prntGroup.AttachToArrowPoint(childNode, 10);
           }

           if (node != null)  fc.CreateArrow(node, childNode);

           childNode.Tag =id  ;
           // link the parent node with the child


           // start a new group to which node children will be added
           if(newnode)
           
           {
           Group group = fc.CreateGroup(childNode);
           group.Tag = id;
           
           }
           rearrange();
           childNode.Text = title;
           return childNode;
       }

It places great big distances between my items. how can i avoid them? how can i make my autoarrowed diagram more compact to fit in a few papers? thank you
----------------

My other question is this.

when my diagram is about 100 page, the canvas ends in some point and i cant see the last item (it expands if i resize something until there but it is hard and annoying to do this many times)

how can i resize my canvas to show all controls in it?

Thanks
and a nodes children are displayed like xxxxxxxxx is there an option for making it like

xxx
xxx
xxx

like 3 columns table?