diff --git a/PowerEditor/src/WinControls/Preference/preferenceDlg.cpp b/PowerEditor/src/WinControls/Preference/preferenceDlg.cpp
index b8151551..33eea15b 100644
--- a/PowerEditor/src/WinControls/Preference/preferenceDlg.cpp
+++ b/PowerEditor/src/WinControls/Preference/preferenceDlg.cpp
@@ -592,7 +592,7 @@ static LRESULT CALLBACK editNumSpaceProc(HWND hwnd, UINT message, WPARAM wParam,
 void MarginsDlg::initScintParam()
 {
 	NppParameters& nppParam = NppParameters::getInstance();
-	const ScintillaViewParams & svp = nppParam.getSVP();
+	ScintillaViewParams & svp = const_cast<ScintillaViewParams &>(nppParam.getSVP());
 	
 	::SendDlgItemMessage(_hSelf, IDC_RADIO_BOX, BM_SETCHECK, FALSE, 0);
 	::SendDlgItemMessage(_hSelf, IDC_RADIO_CIRCLE, BM_SETCHECK, FALSE, 0);
@@ -642,7 +642,18 @@ void MarginsDlg::initScintParam()
 
 	::SendDlgItemMessage(_hSelf, IDC_CHECK_NOEDGE, BM_SETCHECK, !svp._showBorderEdge, 0);
 
-	::SendDlgItemMessage(_hSelf, IDC_CHECK_EDGEBGMODE, BM_SETCHECK, svp._isEdgeBgMode, 0);
+	bool canBeBg = svp._edgeMultiColumnPos.size() == 1;
+	if (!canBeBg)
+	{
+		svp._isEdgeBgMode = false;
+		::SendDlgItemMessage(_hSelf, IDC_CHECK_EDGEBGMODE, BM_SETCHECK, FALSE, 0);
+		::EnableWindow(::GetDlgItem(_hSelf, IDC_CHECK_EDGEBGMODE), FALSE);
+	}
+	else
+	{
+		::SendDlgItemMessage(_hSelf, IDC_CHECK_EDGEBGMODE, BM_SETCHECK, svp._isEdgeBgMode, 0);
+	}
+	
 
 	generic_string edgeColumnPosStr;
 	for (auto i : svp._edgeMultiColumnPos)
@@ -721,7 +732,7 @@ INT_PTR CALLBACK MarginsDlg::run_dlgProc(UINT message, WPARAM wParam, LPARAM lPa
 
 		case WM_COMMAND : 
 		{
-			ScintillaViewParams & svp = (ScintillaViewParams &)nppParam.getSVP();
+			ScintillaViewParams & svp = const_cast<ScintillaViewParams &>(nppParam.getSVP());
 			switch (wParam)
 			{
 				case IDC_CHECK_SMOOTHFONT: