diff --git a/src/main/java/jaist/css/covis/RootWindow.java b/src/main/java/jaist/css/covis/RootWindow.java
index f83e98f..f0ed524 100644
--- a/src/main/java/jaist/css/covis/RootWindow.java
+++ b/src/main/java/jaist/css/covis/RootWindow.java
@@ -448,13 +448,13 @@
 
 	public void tobeclosed() {
 		if (windows.size() == 1) {
-			if (JOptionPane.showConfirmDialog(this.frame, "Really Exit?", "Confirm",
-					JOptionPane.YES_NO_OPTION) == JOptionPane.YES_OPTION) {
+			// if (JOptionPane.showConfirmDialog(this.frame, "Really Exit?", "Confirm",
+			// 		JOptionPane.YES_NO_OPTION) == JOptionPane.YES_OPTION) {
 				// buffer.addLogNow(1, "Exit");
 				System.exit(0);
-			} else {
+			// } else {
 
-			}
+			// }
 		} else {
 			windows.remove(this);
 			this.frame.setVisible(false);
diff --git a/src/main/java/jaist/css/covis/util/MyPCanvas.java b/src/main/java/jaist/css/covis/util/MyPCanvas.java
index 2e59bd8..1981950 100644
--- a/src/main/java/jaist/css/covis/util/MyPCanvas.java
+++ b/src/main/java/jaist/css/covis/util/MyPCanvas.java
@@ -112,7 +112,7 @@
 //				System.out.println("wheel rotation: " + pc.getAttribute("hoge"));
 				PBounds pb = pc.getViewBounds();
 //				System.out.println(pb.toString());
-				float f = 1.0f + (0.2f * direction * e.getWheelRotation());
+				float f = 1.0f + (0.1f * direction * e.getWheelRotation());
 				if (e.getWheelRotation() //下に回すと正になるので
 						* direction < 0) {
 					pb = zoomBounds_focusbyCursor(pb, f);