diff --git a/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs b/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
index 10a4019..53165dd 100644
--- a/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
+++ b/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
@@ -732,6 +732,41 @@ namespace JoyD.Windows.CS
                     
                     // 调用按钮可见性更新方法设置为温差图绘制状态
                     UpdateButtonsVisibility(3); // 3表示温差图绘制状态
+                    
+                    // 确保温差图例有数据且默认选中第一行
+                    if (dataGridViewTempDiff.Rows.Count > 0)
+                    {
+                        // 清除当前选择
+                        dataGridViewTempDiff.ClearSelection();
+                        // 选中第一行
+                        dataGridViewTempDiff.Rows[0].Selected = true;
+                        // 手动触发SelectionChanged事件处理逻辑
+                        // 这里不直接调用事件，而是直接更新画笔按钮可见性
+                        btnBrushSize1.Visible = true;
+                        btnBrushSize3.Visible = true;
+                        btnBrushSize5.Visible = true;
+                        btnBrushSize10.Visible = true;
+                        btnBrushSize15.Visible = true;
+                        
+                        // 确保当前选中的画笔大小按钮处于选中状态
+                        UpdateBrushSizeButtonSelection(_currentBrushSize);
+                        
+                        // 控制分隔条可见性
+                        ToolStripSeparator toolStripSeparator = null;
+                        for (int i = 0; i < toolStrip.Items.Count - 1; i++)
+                        {
+                            if (toolStrip.Items[i] == btnDeleteTempDiff && toolStrip.Items[i + 1] is ToolStripSeparator)
+                            {
+                                toolStripSeparator = toolStrip.Items[i + 1] as ToolStripSeparator;
+                                break;
+                            }
+                        }
+                        
+                        if (toolStripSeparator != null)
+                        {
+                            toolStripSeparator.Visible = btnDeleteTempDiff.Visible && btnBrushSize1.Visible;
+                        }
+                    }
                 }
                 else
                 {