diff --git a/OptiScaler/Config.cpp b/OptiScaler/Config.cpp
index d90d8d4f..f26e2e58 100644
--- a/OptiScaler/Config.cpp
+++ b/OptiScaler/Config.cpp
@@ -57,6 +57,10 @@ bool Config::Reload(std::filesystem::path iniPath)
             FGHUDFix = readBool("FrameGen", "HUDFix");
             FGHUDLimit = readInt("FrameGen", "HUDLimit");
             FGHUDFixExtended = readBool("FrameGen", "HUDFixExtended");
+            FGRectLeft = readInt("FrameGen", "RectLeft");
+            FGRectTop = readInt("FrameGen", "RectTop");
+            FGRectWidth = readInt("FrameGen", "RectWidth");
+            FGRectHeight = readInt("FrameGen", "RectHeight");
         }
 
         // FSR
@@ -480,6 +484,10 @@ bool Config::SaveIni()
         ini.SetValue("FrameGen", "HUDFix", GetBoolValue(Instance()->FGHUDFix).c_str());
         ini.SetValue("FrameGen", "HUDLimit", GetIntValue(Instance()->FGHUDLimit).c_str());
         ini.SetValue("FrameGen", "HUDFixExtended", GetBoolValue(Instance()->FGHUDFixExtended).c_str());
+        ini.SetValue("FrameGen", "RectLeft", GetIntValue(Instance()->FGRectLeft).c_str());
+        ini.SetValue("FrameGen", "RectTop", GetIntValue(Instance()->FGRectTop).c_str());
+        ini.SetValue("FrameGen", "RectWidth", GetIntValue(Instance()->FGRectWidth).c_str());
+        ini.SetValue("FrameGen", "RectHeight", GetIntValue(Instance()->FGRectHeight).c_str());
     }
 
     // Output Scaling
diff --git a/OptiScaler/Config.h b/OptiScaler/Config.h
index 89a56964..c34b5e0c 100644
--- a/OptiScaler/Config.h
+++ b/OptiScaler/Config.h
@@ -167,6 +167,10 @@ public:
 	std::optional<bool> FGHUDFix;
 	std::optional<bool> FGHUDFixExtended;
 	std::optional<int> FGHUDLimit;
+	std::optional<int> FGRectLeft;
+	std::optional<int> FGRectTop;
+	std::optional<int> FGRectWidth;
+	std::optional<int> FGRectHeight;
 	bool FGOnlyGenerated = false;
 	bool FGChanged = false;
 	bool SCChanged = false;
diff --git a/OptiScaler/imgui/imgui_common.cpp b/OptiScaler/imgui/imgui_common.cpp
index f7f24a2f..c7cb2a5e 100644
--- a/OptiScaler/imgui/imgui_common.cpp
+++ b/OptiScaler/imgui/imgui_common.cpp
@@ -964,6 +964,46 @@ void ImGuiCommon::RenderMenu()
 
                         ImGui::Checkbox("FG Only Generated", &Config::Instance()->FGOnlyGenerated);
                         ShowHelpMarker("Display only FSR 3.1 generated frames");
+
+                        if (Config::Instance()->AdvancedSettings.value_or(false))
+                        {
+                            ImGui::PushItemWidth(95.0);
+                            int rectLeft = Config::Instance()->FGRectLeft.value_or(0);
+                            if (ImGui::InputInt("Rect Left", &rectLeft))
+                                Config::Instance()->FGRectLeft = rectLeft;
+
+                            ImGui::SameLine(0.0f, 16.0f);
+                            int rectTop = Config::Instance()->FGRectTop.value_or(0);
+                            if (ImGui::InputInt("Rect Top", &rectTop))
+                                Config::Instance()->FGRectTop = rectTop;
+
+                            int rectWidth = Config::Instance()->FGRectWidth.value_or(0);
+                            if (ImGui::InputInt("Rect Width", &rectWidth))
+                                Config::Instance()->FGRectWidth = rectWidth;
+
+                            ImGui::SameLine(0.0f, 16.0f);
+                            int rectHeight = Config::Instance()->FGRectHeight.value_or(0);
+                            if (ImGui::InputInt("Rect Height", &rectHeight))
+                                Config::Instance()->FGRectHeight = rectHeight;
+
+                            ImGui::PopItemWidth();
+                            ShowHelpMarker("Frame generation rectangle, adjust for letterboxed content");
+
+                            ImGui::BeginDisabled(!Config::Instance()->FGRectLeft.has_value() && !Config::Instance()->FGRectTop.has_value() &&
+                                                 !Config::Instance()->FGRectWidth.has_value() && !Config::Instance()->FGRectHeight.has_value());
+
+                            if (ImGui::Button("Reset FG Rect"))
+                            {
+                                Config::Instance()->FGRectLeft.reset();
+                                Config::Instance()->FGRectTop.reset();
+                                Config::Instance()->FGRectWidth.reset();
+                                Config::Instance()->FGRectHeight.reset();
+                            }
+
+                            ShowHelpMarker("Resets frame generation rectangle");
+
+                            ImGui::EndDisabled();
+                        }
                     }
 
                     // Dx11 with Dx12