diff --git a/src/main.cc b/src/main.cc
index a3f753e..1834cb0 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -531,7 +531,8 @@ int main() {
   ImGui::CreateContext();
   ImGui::StyleColorsDark();
   ImGuiIO& io = ImGui::GetIO();
-  io.IniFilename = nullptr;
+  io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;
+  io.IniFilename = "ATPImgui.ini";
   io.Fonts->AddFontDefault();
   io.KeyMap[ImGuiKey_Tab] = GLFW_KEY_TAB;
   io.KeyMap[ImGuiKey_LeftArrow] = GLFW_KEY_LEFT;
@@ -733,6 +734,8 @@ int main() {
           camera_accel);
     }
 
+    ImGui::DockSpaceOverViewport(ImGui::GetMainViewport());
+
     if (ImGui::BeginMainMenuBar()) {
       if (ImGui::BeginMenu("File")) {
         if (ImGui::MenuItem("Quit")) {