diff --git a/tools/apps/hgjson/hgjson.rc b/tools/apps/hgjson/hgjson.rc
index 3065141..880020c 100644
Binary files a/tools/apps/hgjson/hgjson.rc and b/tools/apps/hgjson/hgjson.rc differ
diff --git a/tools/apps/hgjson/hgjsonDlg.cpp b/tools/apps/hgjson/hgjsonDlg.cpp
index 1a5cf71..b1dc9f7 100644
--- a/tools/apps/hgjson/hgjsonDlg.cpp
+++ b/tools/apps/hgjson/hgjsonDlg.cpp
@@ -6301,6 +6301,8 @@ void ChgjsonDlg::set_control_status(const HGITEM& item)
 	GetDlgItem(IDC_STATIC_DEFAULT)->ShowWindow(SW_HIDE);
 	GetDlgItem(IDC_EDIT_DEFAULT)->ShowWindow(SW_HIDE);
 	GetDlgItem(IDC_COMBO_DEFAULT)->ShowWindow(SW_HIDE);
+	GetDlgItem(IDC_EDIT_STEP)->ShowWindow(SW_HIDE);
+	GetDlgItem(IDC_STATIC_STEP)->ShowWindow(SW_HIDE);
 	constraint_.SetCurSel(item.range.type);
 	if (item.range.type == RANGE_TYPE_NONE)
 	{
@@ -6326,11 +6328,14 @@ void ChgjsonDlg::set_control_status(const HGITEM& item)
 		GetDlgItem(IDC_STATIC_TO)->ShowWindow(SW_SHOW);
 		GetDlgItem(IDC_EDIT_FROM)->ShowWindow(SW_SHOW);
 		GetDlgItem(IDC_EDIT_TO)->ShowWindow(SW_SHOW);
+		GetDlgItem(IDC_EDIT_STEP)->ShowWindow(SW_SHOW);
+		GetDlgItem(IDC_STATIC_STEP)->ShowWindow(SW_SHOW);
 
 		if (item.type == L"int")
 		{
 			SetDlgItemInt(IDC_EDIT_FROM, item.range.lower);
 			SetDlgItemInt(IDC_EDIT_TO, item.range.upper);
+			SetDlgItemInt(IDC_EDIT_STEP, item.range.step);
 		}
 		else
 		{
@@ -6341,6 +6346,9 @@ void ChgjsonDlg::set_control_status(const HGITEM& item)
 
 			swprintf_s(buf, _countof(buf) - 1, L"%f", item.range.upper);
 			::SetDlgItemTextW(m_hWnd, IDC_EDIT_TO, buf);
+
+			swprintf_s(buf, _countof(buf) - 1, L"%f", item.range.step);
+			::SetDlgItemTextW(m_hWnd, IDC_EDIT_STEP, buf);
 		}
 	}
 	else // list
@@ -6449,11 +6457,13 @@ void* ChgjsonDlg::create_json(int item, std::vector<DEFH>* def_h, std::wstring*
 		{
 			r->set_value(L"min", (int)hg_items_[item].range.lower);
 			r->set_value(L"max", (int)hg_items_[item].range.upper);
+			r->set_value(L"step", (int)hg_items_[item].range.step);
 		}
 		else
 		{
 			r->set_value(L"min", hg_items_[item].range.lower);
 			r->set_value(L"max", hg_items_[item].range.upper);
+			r->set_value(L"step", hg_items_[item].range.step);
 		}
 		jsn->set_value(L"range", r);
 		r->release();
@@ -6745,12 +6755,16 @@ void ChgjsonDlg::add_item(void* jsn_root, void* jsn_obj, HTREEITEM parent, bool
 	{
 		if (item.type == L"int")
 		{
-			int	l = 0, u = 0;
+			int	l = 0, u = 0, s = 0;
 			if (child->get_value(L"min", l))
 			{
 				child->get_value(L"max", u);
 				item.range.lower = l;
 				item.range.upper = u;
+				if (child->get_value(L"step", s))
+					item.range.step = s;
+				else
+					item.range.step = 1;
 				item.range.type = RANGE_TYPE_RANGE;
 			}
 			else
@@ -6775,6 +6789,8 @@ void ChgjsonDlg::add_item(void* jsn_root, void* jsn_obj, HTREEITEM parent, bool
 			if (child->get_value(L"min", item.range.lower))
 			{
 				child->get_value(L"max", item.range.upper);
+				if (!child->get_value(L"step", item.range.step))
+					item.range.step = (item.range.upper - item.range.lower) / 10.0f;
 				item.range.type = RANGE_TYPE_RANGE;
 			}
 			else
@@ -7385,6 +7401,8 @@ void ChgjsonDlg::OnCbnSelchangeConstraintType()
 	GetDlgItem(IDC_STATIC_TO)->ShowWindow(SW_HIDE);
 	GetDlgItem(IDC_EDIT_FROM)->ShowWindow(SW_HIDE);
 	GetDlgItem(IDC_EDIT_TO)->ShowWindow(SW_HIDE);
+	GetDlgItem(IDC_EDIT_STEP)->ShowWindow(SW_HIDE);
+	GetDlgItem(IDC_STATIC_STEP)->ShowWindow(SW_HIDE);
 	constraint_list_.ShowWindow(SW_HIDE);
 
 	if (sel == 0)
@@ -7406,6 +7424,8 @@ void ChgjsonDlg::OnCbnSelchangeConstraintType()
 		GetDlgItem(IDC_EDIT_TO)->ShowWindow(SW_SHOW);
 		GetDlgItem(IDC_STATIC_DEFAULT)->ShowWindow(SW_SHOW);
 		GetDlgItem(IDC_EDIT_DEFAULT)->ShowWindow(SW_SHOW);
+		GetDlgItem(IDC_EDIT_STEP)->ShowWindow(SW_SHOW);
+		GetDlgItem(IDC_STATIC_STEP)->ShowWindow(SW_SHOW);
 	}
 	else // if( sel == 2)
 	{
@@ -7741,6 +7761,10 @@ void ChgjsonDlg::OnBnClickedButton4()
 			it->range.lower = _wtof(str);
 			::GetDlgItemTextW(m_hWnd, IDC_EDIT_TO, str, _countof(str) - 1);
 			it->range.upper = _wtof(str);
+			::GetDlgItemTextW(m_hWnd, IDC_EDIT_STEP, str, _countof(str) - 1);
+			it->range.step = _wtof(str);
+			if (fabs(it->range.step) < .000001f)
+				it->range.step = (it->range.upper - it->range.lower) / 10.0f;
 		}
 	}
 
diff --git a/tools/apps/hgjson/hgjsonDlg.h b/tools/apps/hgjson/hgjsonDlg.h
index 603d9cc..4c4b99f 100644
--- a/tools/apps/hgjson/hgjsonDlg.h
+++ b/tools/apps/hgjson/hgjsonDlg.h
@@ -50,6 +50,7 @@ public:
 		int  type;
 		double lower;
 		double upper;
+		double step;
 		std::vector<std::wstring> queue;
 	}RANGE;
 	typedef struct _hg_item
diff --git a/tools/apps/hgjson/resource.h b/tools/apps/hgjson/resource.h
index 75f3a7c..460bd7b 100644
Binary files a/tools/apps/hgjson/resource.h and b/tools/apps/hgjson/resource.h differ
diff --git a/tools/solution/Release/hgjson.exe b/tools/solution/Release/hgjson.exe
index f9ec08c..d4a844b 100644
Binary files a/tools/solution/Release/hgjson.exe and b/tools/solution/Release/hgjson.exe differ