diff --git a/AlgebraicDataflowArchitectureModel/src/application/editor/Editor.java b/AlgebraicDataflowArchitectureModel/src/application/editor/Editor.java
index ed5bfa9..48c7484 100644
--- a/AlgebraicDataflowArchitectureModel/src/application/editor/Editor.java
+++ b/AlgebraicDataflowArchitectureModel/src/application/editor/Editor.java
@@ -172,7 +172,7 @@
                 // Force to change PushPullSelectionStage to construct mxGraph
                 boolean stageChanged = changeStage(STAGE_PUSH_PULL_SELECTION);
                 if (stageChanged && curStage instanceof PushPullSelectionStage) {
-                    ((PushPullSelectionStage) curStage).constructGraph();
+                    ((PushPullSelectionStage) curStage).constructGraph();		// Construction of data-flow graph
                 }
 
                 // Set layout
@@ -208,7 +208,7 @@
                 // Force to change PushPullSelectionStage to construct mxGraph
                 boolean stageChanged = changeStage(STAGE_PUSH_PULL_SELECTION);
                 if (stageChanged && curStage instanceof PushPullSelectionStage) {
-                    ((PushPullSelectionStage) curStage).constructGraph();
+                    ((PushPullSelectionStage) curStage).constructGraph();		// Construction of data-flow graph
                 }
 
                 // Restore the geometry