diff --git a/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs b/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
index 17a56ac..db1d7a6 100644
--- a/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
+++ b/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
@@ -448,8 +448,9 @@ namespace JoyD.Windows.CS
         {
             try
             {
-                // 只有在温差图绘制状态下，且有选中行时，显示画笔大小按钮
-                if (_isTempDiffDrawingMode && dataGridViewTempDiff.SelectedRows.Count > 0)
+                // 检查当前是否在温差图绘制状态下
+                // 只有同时满足：处于温差图绘制模式、有选中的图例行、并且dataGridViewTempDiff控件可见时，才显示画笔大小按钮
+                if (_isTempDiffDrawingMode && dataGridViewTempDiff.SelectedRows.Count > 0 && dataGridViewTempDiff.Visible)
                 {
                     // 显示所有画笔大小按钮
                     btnBrushSize1.Visible = true;
@@ -463,7 +464,7 @@ namespace JoyD.Windows.CS
                 }
                 else
                 {
-                    // 隐藏所有画笔大小按钮
+                    // 其他所有情况都隐藏画笔大小按钮，确保在就绪状态下正确隐藏
                     btnBrushSize1.Visible = false;
                     btnBrushSize3.Visible = false;
                     btnBrushSize5.Visible = false;