diff --git a/a1_swap_mod_packer/gui.py b/a1_swap_mod_packer/gui.py
index 020c90a..59c530b 100644
--- a/a1_swap_mod_packer/gui.py
+++ b/a1_swap_mod_packer/gui.py
@@ -494,16 +494,12 @@ class MainWindow(QMainWindow):
         self.swap_gcode_combo = QComboBox()
         self.swap_gcode_combo.setMinimumWidth(260)
         self.swap_gcode_combo.setMaximumWidth(440)
-        swap_gcode_row = QHBoxLayout()
         refresh_button = QPushButton("刷新")
         open_folder_button = QPushButton("打开文件夹")
         refresh_button.setFixedWidth(refresh_button.sizeHint().width())
         open_folder_button.setFixedWidth(open_folder_button.sizeHint().width())
         refresh_button.clicked.connect(self.load_swap_gcode_to_combo)
         open_folder_button.clicked.connect(self.open_swap_gcode_folder)
-        swap_gcode_row.addWidget(self.swap_gcode_combo, 1)
-        swap_gcode_row.addWidget(refresh_button)
-        swap_gcode_row.addWidget(open_folder_button)
 
         # 默认份数
         self.default_copies_spin = QSpinBox()
@@ -605,8 +601,13 @@ class MainWindow(QMainWindow):
             label.setAlignment(Qt.AlignLeft | Qt.AlignVCenter)
             grid.addWidget(label, row, col)
 
-        # 第 0 行：换盘 G-code 跨全行
-        grid.addLayout(swap_gcode_row, 0, 1, 1, 3)
+        # 第 0 行：换盘 G-code（下拉框跨 col1-2，按钮放 col3 对齐右侧控件）
+        grid.addWidget(self.swap_gcode_combo, 0, 1, 1, 2)
+        swap_btn_row = QHBoxLayout()
+        swap_btn_row.addWidget(refresh_button)
+        swap_btn_row.addWidget(open_folder_button)
+        swap_btn_row.addStretch(1)
+        grid.addLayout(swap_btn_row, 0, 3)
 
         # 第 1 行：默认份数 | 热床降温
         grid.addWidget(self.default_copies_spin, 1, 1)