diff --git a/Rs.Controls/RsTray.cs b/Rs.Controls/RsTray.cs
index 6f3a27a..34ca0bc 100644
--- a/Rs.Controls/RsTray.cs
+++ b/Rs.Controls/RsTray.cs
@@ -21,10 +21,30 @@ namespace Rs.Controls
 
     public enum ESortDir
     {
+        /// <summary>
+        /// 从左到右画
+        /// </summary>
         LeftToRight,
+        /// <summary>
+        /// 从左上到左下画
+        /// </summary>
+        LeftTopToBottom,
+        /// <summary>
+        /// 从左下到左上画
+        /// </summary>
+        LeftBottomToTop,
+        /// <summary>
+        /// 从右向左画
+        /// </summary>
         RightToLeft,
+        /// <summary>
+        /// 从右上到右下画
+        /// </summary>
         RightTopToBottom,
-        LeftBottomToTop
+        /// <summary>
+        /// 从右下到右上画
+        /// </summary>
+        RightBottomToTop
     }
 
     public enum ESlotStatus
@@ -433,6 +453,46 @@ namespace Rs.Controls
                     }
                 }
             }
+            else if (sortDir == ESortDir.RightBottomToTop)
+            {
+                ShowColNumber = ShowRowNumber = false;
+                slotWidth = (this.panel2.Width) / ColumnNum;
+                slotHeight = (this.panel2.Height) / RowNum;
+                //从列开始画
+                for (int c = ColumnNum; c >0; c--)
+                {
+                    for (int r = RowNum; r > 0; r--)
+                    {
+                        index++;
+                        if (traySlotsDic.ContainsKey(index))
+                        {
+                            float x = slotWidth * (c-1);
+                            float y = slotHeight * (r - 1);
+                            traySlotsDic[index].Bound = new RectangleF(x, y, (int)slotWidth - ColSpace, (int)slotHeight - RowSpace);
+                        }
+                    }
+                }
+            }
+            else if (sortDir == ESortDir.LeftTopToBottom)
+            {
+                ShowColNumber = ShowRowNumber = false;
+                slotWidth = (this.panel2.Width) / ColumnNum;
+                slotHeight = (this.panel2.Height) / RowNum;
+                //从行开始画
+                for (int c = 0; c < ColumnNum; c++)
+                {
+                    for (int r = 0;r< RowNum; r++)
+                    {
+                        index++;
+                        if (traySlotsDic.ContainsKey(index))
+                        {
+                            float x = slotWidth * c;
+                            float y = slotHeight * (r);
+                            traySlotsDic[index].Bound = new RectangleF(x, y, (int)slotWidth - ColSpace, (int)slotHeight - RowSpace);
+                        }
+                    }
+                }
+            }
             else if (sortDir == ESortDir.LeftBottomToTop)
             {
                 ShowColNumber = ShowRowNumber = false;
@@ -450,23 +510,6 @@ namespace Rs.Controls
                             float y = slotHeight * (r-1);
                             traySlotsDic[index].Bound = new RectangleF(x, y, (int)slotWidth - ColSpace, (int)slotHeight - RowSpace);
                         }
-
-
-                        //index++;
-                        //if (traySlotsDic.ContainsKey(index))
-                        //{
-                        //    float y = 0;
-                        //    float x = LeftSpaceWidth + slotWidth * r;
-                        //    if(!ShowColNumber)
-                        //    {
-                        //        y = slotHeight * c - TopSpaceHeight / 2;
-                        //    }
-                        //    else
-                        //    {
-                        //        y = slotHeight * c;
-                        //    }
-                        //    traySlotsDic[index].Bound = new RectangleF(x, y, (int)slotWidth - ColSpace, (int)slotHeight - RowSpace);
-                        //}
                     }
                 }
             }