diff --git a/src/gui.cpp b/src/gui.cpp
index 005948a..c898401 100644
--- a/src/gui.cpp
+++ b/src/gui.cpp
@@ -24,16 +24,25 @@ gui::Gui::~Gui() noexcept {
 
 void gui::Gui::render_gui() {
 	if (initialized) {
+		constexpr ImGuiWindowFlags flags = ImGuiWindowFlags_NoMove |
+										   ImGuiWindowFlags_NoResize |
+										   ImGuiWindowFlags_NoCollapse |
+										   ImGuiWindowFlags_NoTitleBar;
+
 		ImGui_ImplOpenGL3_NewFrame();
 		ImGui_ImplGlfw_NewFrame();
 		ImGui::NewFrame();
 
 		//TODO GUI
-		if (!ImGui::Begin("Billy")) {
-			ImGui::End();
-			ImGui::Render();
-			return;
+		{
+			const ImGuiViewport &viewport = *ImGui::GetMainViewport();
+			ImGui::SetNextWindowPos(viewport.Pos);
+			ImGui::SetNextWindowSize(viewport.Size);
 		}
+
+		// Never collapsed.
+		ImGui::Begin("Billy", nullptr, flags);
+
 		ImGui::Text("Hello world!");
 		ImGui::Text("Average framerate: %.3f ms/frame (%.1f FPS)", 1000.f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);