--- a/scn2k/scn2k_text.cc
+++ b/scn2k/scn2k_text.cc
@@ -693,8 +693,9 @@ void TextImpl::CreateSelect(Cmd& cmd) {
 External_select:
 		CreateSelBG();
 		hide(); // なので、テキストウィンドウは消去
-		int baseposx, baseposy, repposx, repposy;
+		int baseposx, baseposy, repposx, repposy, centerx, centery;
 		int mojisize, col1, col2;
+		config.GetParam("#SELBTN.000.CENTERING", 2, &centerx, &centery);
 		config.GetParam("#SELBTN.000.BASEPOS", 2, &baseposx, &baseposy);
 		config.GetParam("#SELBTN.000.REPPOS", 2, &repposx, &repposy);
 		config.GetParam("#SELBTN.000.MOJISIZE", 1, &mojisize);
@@ -713,6 +714,10 @@ External_select:
 		/* ウィンドウ背景の大きさを求める */
 		if (baseposx == 0 && sel_bg_rect.width() != 0)
 			baseposx = (parent.Width()-sel_bg_rect.width()) / 2; // ボタン位置をセンタリング
+		if (centerx)
+			baseposx = (parent.Width()-sel_bg_rect.width()-sel_size*repposx) / 2;
+		if (centery)
+			baseposy = (parent.Height()-sel_bg_rect.height()-sel_size*repposy) / 2;
 
 		sel_widget = parent.create_node( Rect(0, 0, parent.Width(), parent.Height()),0);