diff --git a/HaoGaoCOrrect修改记录.txt b/HaoGaoCOrrect修改记录.txt
index 86a8915..a571661 100644
--- a/HaoGaoCOrrect修改记录.txt
+++ b/HaoGaoCOrrect修改记录.txt
@@ -8,6 +8,10 @@
 2021年7月31日
 1.增加3399 板子g100 g200 校正及配置功能
 
+2021年9月14日
+1、增加G300/G400速率可配置
+2、处理G300/G400不能出图问题
+
 2021年8月17日
 1. 界面增加速度模式配置功能；
 2. 增加明场暗场校正最大明场值配置；
diff --git a/HuaGoCorrect/A4.cpp b/HuaGoCorrect/A4.cpp
index e84008d..107916e 100644
--- a/HuaGoCorrect/A4.cpp
+++ b/HuaGoCorrect/A4.cpp
@@ -416,12 +416,20 @@ void CA4::OnBnClickedBtnbdown()
 void CA4::UpdateGains(int id, bool increase)
 {
 	UpdateData(TRUE);
+	int offect;
+	CString offectstr;
+	GetDlgItemText(IDC_tbxOffect, offectstr);
+	USES_CONVERSION;
+	std::string str_b(W2A(offectstr));
+	offect = atoi(str_b.c_str());
+	if (offect <= 0)
+		offect = 1;
 	if ((id == IDC_BTNAUP || id == IDC_BTNBUP) && increase)
 	{
 		int startindex = id == IDC_BTNAUP ? 0 : 6;
 		for (size_t i = startindex; i < (6+ startindex); i++)
 		{
-			params.Gain[i] = params.Gain[i]++;
+			params.Gain[i] += offect;
 		}
 	}
 	else if((id==IDC_BTNADOWN||id==IDC_BTNBDOWN)&&!increase)
@@ -429,7 +437,7 @@ void CA4::UpdateGains(int id, bool increase)
 		int startindex = id == IDC_BTNADOWN ? 0 : 6;
 		for (size_t i = startindex; i < (6 + startindex); i++)
 		{ 
-			params.Gain[i] = params.Gain[i]--;
+			params.Gain[i] -= offect;
 		}
 	}
 	UpdateData(FALSE);
diff --git a/HuaGoCorrect/Resource.h b/HuaGoCorrect/Resource.h
index 298b72c..4b68b22 100644
Binary files a/HuaGoCorrect/Resource.h and b/HuaGoCorrect/Resource.h differ