diff --git a/cVMS.NET_CS/HMI/MainDisplay/DispCtrl.cs b/cVMS.NET_CS/HMI/MainDisplay/DispCtrl.cs
index 3c7614a..f8e5da2 100644
--- a/cVMS.NET_CS/HMI/MainDisplay/DispCtrl.cs
+++ b/cVMS.NET_CS/HMI/MainDisplay/DispCtrl.cs
@@ -51,7 +51,7 @@ namespace vmsnet.HMI
     {
         public bool MonitorOn { get; set; }
         public CMouseinfo Mouseinfo;    //마우스위치정보
-     
+
         //그룹데이터
         public CGROUP[] GROUPS = new CGROUP[0];
         public CWINDOW WINDOW = new CWINDOW();
@@ -1543,7 +1543,7 @@ namespace vmsnet.HMI
                 {
                     using (var ifont = new Font(this.font_header, FontStyle.Bold))
                     {
-                        String nbstr = "▣ NULL BALANCE ▣";
+                        String nbstr = $"▣ {grp.이름} - NULL BALANCE ▣";
                         nbstr += "\n\n▶L:" + grp._null_valueL.ToString("#0.00") + "v";
                         nbstr += ",R:" + grp._null_valueR.ToString("#0.00") + "v";
                         nbstr += "    ▶DEV(R-L):" + (grp._null_valueR - grp._null_valueL).ToString("#0.00") + "v";
@@ -1653,7 +1653,7 @@ namespace vmsnet.HMI
                 this.WINDOW._itemheight = WindowRect.Height / this.WINDOW.RowCount;
             }
 
-          
+
             if (this.GROUPS.Length < 1)
             {
                 g.DrawString("NO Group", this.Font, Brushes.Red, WindowRect.Left, WindowRect.Top);
@@ -1672,19 +1672,35 @@ namespace vmsnet.HMI
                     var 열번호 = grp.열번호;
                     var 줄번호 = grp.줄번호;
 
+                    //전체화면이 아닌경우라면 지정된 그룹만 표시한다
                     if (FullScreen == false)
                     {
-                        if (ShowIndex < 0 || ShowIndex > this.GROUPS.GetUpperBound(0)) visible = false;
+                        if (ShowIndex < 0 || ShowIndex > this.GROUPS.GetUpperBound(0)) visible = false; //인덱스오류체크
                         else visible = (idx == ShowIndex);
                         열번호 = 0;
                         줄번호 = 0;
                     }
+
+
+
+                    //마우스를 올린경우 추가정보 표시
                     if (grp.Showinfo) infogrp = grp;
                     else DrawGroup(g, grp, new Point(0, 0), new SizeF(WINDOW.ITEMWIDTH, WINDOW.ITEMHEIGHT), WindowRect, 열번호, 줄번호, false, visible);
                     idx += 1;
                 }
+
                 if (infogrp != null)
-                    DrawGroup(g, infogrp, new Point(0, 0), new SizeF(WINDOW.ITEMWIDTH, WINDOW.ITEMHEIGHT), WindowRect, infogrp.열번호, infogrp.줄번호, false, true);
+                {
+                    var colnum = infogrp.열번호;
+                    var rownum = infogrp.줄번호;
+                    if (FullScreen == false)
+                    {
+                        colnum = 0;
+                        rownum = 0;
+                    }
+                    DrawGroup(g, infogrp, new Point(0, 0), new SizeF(WINDOW.ITEMWIDTH, WINDOW.ITEMHEIGHT), WindowRect, colnum, rownum, false, true);
+
+                }
 
                 //end group
                 //}
@@ -1879,6 +1895,9 @@ namespace vmsnet.HMI
         private int Check_GroupHeader(MouseEventArgs e, Boolean resetshowinfo = false)
         {
             if (this.GROUPS == null) return -1;
+
+
+
             for (int i = 0; i < this.GROUPS.Length; i++)
             {
                 RectangleF rect = this.GROUPS[i].Rect_Header;
@@ -1887,7 +1906,16 @@ namespace vmsnet.HMI
                 //현재위치가 해당 Rectagle 안이라면 속해있다.                    
                 if (e.X > rect.X && e.X < rect.X + rect.Width)
                 {
-                    if (e.Y > rect.Y && e.Y < rect.Y + rect.Height) return i;
+                    if (e.Y > rect.Y && e.Y < rect.Y + rect.Height)
+                    {
+                        //전체화면이 아닌경우에는 선택된 그룹번호를 반환
+                        if (this.FullScreen == false)
+                        {
+                            if (this.ShowIndex < 0 || this.ShowIndex >= this.GroupCount) return -1;
+                            else return this.ShowIndex;
+                        }
+                        else return i;
+                    }
                 }
             }
             return -1;