diff --git a/main.cpp b/main.cpp
index 05ae250..d6fdc4a 100644
--- a/main.cpp
+++ b/main.cpp
@@ -125,7 +125,7 @@ int main(int argc, char* argv[])
     std::atexit(glfwTerminate);
     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
     glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
-    static GLFWwindow* window = glfwCreateWindow(1280, 2200, "fastsa", nullptr, nullptr);
+    static GLFWwindow* window = glfwCreateWindow(1500, 2200, "fastsa", nullptr, nullptr);
     if(window == nullptr) {
         std::cerr << "failed to create GLFW window" << std::endl;
         return 1;
@@ -151,13 +151,15 @@ int main(int argc, char* argv[])
     ImGui_ImplOpenGL3_Init("#version 130");
     std::atexit(ImGui_ImplOpenGL3_Shutdown);
 
-    GLuint waterfall;
-    glGenTextures(1, &waterfall);
-    glBindTexture(GL_TEXTURE_2D, waterfall);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    GLuint wftex[2];
+    for(size_t i=0;i<2;i++) {
+        glGenTextures(1, &wftex[i]);
+        glBindTexture(GL_TEXTURE_2D, wftex[i]);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    }
 
     int status;
     struct bladerf_devinfo dev_info;
@@ -212,7 +214,7 @@ int main(int argc, char* argv[])
     std::atexit(TerminateDSP);
 
     bool exit = false;
-    bool update = true;
+    bool update_wf = true;
     float freq_setpoint_local = 0.0f;
     float tec_bias_local = 0.02f;
     float tec_p_local = 0.001f;
@@ -221,13 +223,20 @@ int main(int argc, char* argv[])
         glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT);
 
-        glBindTexture(GL_TEXTURE_2D, waterfall);
-        #if defined(GL_UNPACK_ROW_LENGTH) && !defined(__EMSCRIPTEN__)
-        glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
-        #endif
-        if(update) {
-            std::lock_guard<std::mutex> guard(wf_data_mutex);
-            glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, wf_width, wf_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, wf_data);
+        if(update_wf) {
+            #if defined(GL_UNPACK_ROW_LENGTH) && !defined(__EMSCRIPTEN__)
+            glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+            #endif
+            glBindTexture(GL_TEXTURE_2D, wftex[0]);
+            {
+                std::lock_guard<std::mutex> guard(wf_data_mutex);
+                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, wf_width, wf_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, wf_data);
+            }
+            glBindTexture(GL_TEXTURE_2D, wftex[1]);
+            {
+                std::lock_guard<std::mutex> guard(wf_data_mutex);
+                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, wf_width, wf_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, wf_data);
+            }
         }
 
         ImGui_ImplOpenGL3_NewFrame();
@@ -239,11 +248,13 @@ int main(int argc, char* argv[])
         ImGui::PushStyleVar(ImGuiStyleVar_WindowRounding, 0.0f);
         ImGui::Begin("fastsa", nullptr, ImGuiWindowFlags_NoDecoration | ImGuiWindowFlags_NoResize);
 
-        ImGui::BeginTable("fastsa", 2, ImGuiTableFlags_SizingStretchSame | ImGuiTableFlags_Resizable);
-        ImGui::TableSetupColumn("", 0, 280.0f);
-        ImGui::TableSetupColumn("", 0, 1000.0f);
+        ImGui::BeginTable("fastsa", 3, ImGuiTableFlags_SizingStretchSame | ImGuiTableFlags_Resizable);
+        ImGui::TableSetupColumn("SBS laser control", 0, 280.0f);
+        ImGui::TableSetupColumn("Pump/output heterodyne", 0, 1000.0f);
+        ImGui::TableSetupColumn("Linewidth", 0, 1000.0f);
+        ImGui::TableHeadersRow();
         ImGui::TableNextColumn();
-        ImGui::Checkbox("Update waterfall", &update);
+        ImGui::Checkbox("Update waterfall plots", &update_wf);
         ImGui::Text("Baseband peak: %.3f MHz", (float)freq_peak);
         ImGui::Text("TEC current: %.6f mA", (float)tec_current);
         ImGui::SliderFloat("Setpoint", &freq_setpoint_local, 0.0f, 40.0f);
@@ -256,7 +267,9 @@ int main(int argc, char* argv[])
             exit = true;
         ImGui::Text("FPS: %d", (int)fps);
         ImGui::TableNextColumn();
-        ImGui::Image((void*)(intptr_t)waterfall, ImVec2(wf_width, wf_height));
+        ImGui::Image((void*)(intptr_t)wftex[0], ImVec2(wf_width, wf_height));
+        ImGui::TableNextColumn();
+        ImGui::Image((void*)(intptr_t)wftex[1], ImVec2(wf_width, wf_height));
         ImGui::EndTable();
 
         ImGui::End();