diff --git a/src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Layout/SplineRouting/EdgeRouter.cs b/src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Layout/SplineRouting/EdgeRouter.cs
index 9cec3b0919..4215983829 100644
--- a/src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Layout/SplineRouting/EdgeRouter.cs
+++ b/src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Layout/SplineRouting/EdgeRouter.cs
@@ -16,9 +16,13 @@ namespace Debugger.AddIn.Visualizers.Graph.SplineRouting
 		{
 		}
 		
-		public Dictionary<TEdge, RoutedEdge> RouteEdges<TEdge>(IEnumerable<IRect> nodes, IEnumerable<TEdge> edges) where TEdge : class, IEdge
+		/// <summary>
+		/// Calculates routes for edges in a graph, so that they avoid nodes.
+		/// </summary>
+		public Dictionary<TEdge, RoutedEdge> RouteEdges<TEdge>(IEnumerable<IRect> nodes, IEnumerable<TEdge> edges)
+			where TEdge : class, IEdge
 		{
-			var routeGraph = RouteGraph.InitializeVertices(nodes, edges);
+			var routeGraph = RouteGraph.InitializeVertices(nodes, edges, 0, 0);
 			var routedEdges = new Dictionary<TEdge, RoutedEdge>();
 			var occludedEdges = new List<TEdge>();
 			foreach (var edge in edges) {
diff --git a/src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Layout/SplineRouting/RouteGraph/RouteGraph.cs b/src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Layout/SplineRouting/RouteGraph/RouteGraph.cs
index 0166ecf0ed..007faed4fa 100644
--- a/src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Layout/SplineRouting/RouteGraph/RouteGraph.cs
+++ b/src/AddIns/Debugger/Debugger.AddIn/Visualizers/Graph/Layout/SplineRouting/RouteGraph/RouteGraph.cs
@@ -34,14 +34,21 @@ namespace Debugger.AddIn.Visualizers.Graph.SplineRouting
 			pathFinder = new DijkstraShortestPathFinder(this);
 		}
 		
-		public static RouteGraph InitializeVertices(IEnumerable<IRect> nodes, IEnumerable<IEdge> edges)
+		/// <summary>
+		/// Initializes the RouteGraph by vertices close to node corners.
+		/// </summary>
+		/// <param name="boundX">X coordinates of vertices cannot be lower than this value (so that edges stay in boundaries).</param>
+		/// <param name="boundY">Y coordinates of vertices cannot be lower than this value (so that edges stay in boundaries).</param>
+		public static RouteGraph InitializeVertices(IEnumerable<IRect> nodes, IEnumerable<IEdge> edges, int boundX, int boundY)
 		{
 			var graph = new RouteGraph();
 			// add vertices for node corners
 			foreach (var node in nodes) {
 				graph.Boxes.Add(node);
 				foreach (var vertex in GetRectCorners(node, boxPadding)) {
-					graph.Vertices.Add(vertex);
+					if (vertex.X >= boundX && vertex.Y >= boundY) {
+						graph.Vertices.Add(vertex);
+					}
 				}
 			}
 			// add vertices for egde endpoints