diff --git a/data/layout.xml b/data/layout.xml
index 775f905..4337143 100644
--- a/data/layout.xml
+++ b/data/layout.xml
@@ -332,7 +332,8 @@
         <button-custom id="menu-layers" height="100%" margin="0 0 0 0" justify="center" align="center" pad="8" color=".1">
           <text text="Layers" font-face="arial" font-size="11"/>
         </button-custom>
-        <node height="100%" color="1" grow="1" justify="center" align="flex-end">
+        <node height="100%" color="1" grow="1" align="center" justify="flex-end" dir="row">
+          <text id="txt-memory" text="History memory: 0.0 Kb" font-face="arial" font-size="11" margin="0 20 0 0" color=".6 .6 .6 1"/>
           <text text="PanoPainter 0.1.2 alpha" font-face="arial" font-size="11" margin="0 10 0 0" color=".2 .5 1 1"/>
         </node>
       </border>
@@ -341,6 +342,7 @@
         <button id="btn-open" width="50" height="100%" margin="0 5 0 0" text="Open"/>
         <button id="btn-save" width="50" height="100%" margin="0 5 0 0" text="Save"/>
         <button id="btn-export" width="50" height="100%" margin="0 5 0 0" text="Export"/>
+        <button id="btn-anim" width="50" height="100%" margin="0 5 0 0" text="Anim"/>
         <button id="btn-clear" width="50" height="100%" margin="0 5 0 15" text="Clear"/>
         <button-custom id="btn-bucket" width="50" height="100%" margin="0 20 0 0" thickness="1" border-color="0 0 0 1" pad="2">
           <image path="data/ui/bucket.png" width="100%" height="100%" align="center" justify="flex-end"/>
diff --git a/engine/action.cpp b/engine/action.cpp
index 3109abc..4f3a7bf 100644
--- a/engine/action.cpp
+++ b/engine/action.cpp
@@ -1,5 +1,23 @@
 #include "pch.h"
 #include "log.h"
 #include "action.h"
+#include "app.h"
 
 ActionManager ActionManager::I;
+
+void ActionManager::add(Action *action)
+{
+    I.m_actions.emplace(action);
+    I.m_memory += action->memory();
+    LOG("History: %.2f KB", I.m_memory / 1024.f);
+    App::I.update_memory_usage(I.m_memory);
+}
+
+void ActionManager::undo()
+{
+    I.m_actions.top()->undo();
+    I.m_memory -= I.m_actions.top()->memory();
+    I.m_actions.pop();
+    LOG("History: %.2f KB", I.m_memory / 1024.f);
+    App::I.update_memory_usage(I.m_memory);
+}
diff --git a/engine/action.h b/engine/action.h
index 583ed8f..10a6768 100644
--- a/engine/action.h
+++ b/engine/action.h
@@ -15,19 +15,8 @@ public:
     static ActionManager I;
     std::stack<std::unique_ptr<Action>> m_actions;
     size_t m_memory = 0;
-    static void add(Action* action)
-    {
-        I.m_actions.emplace(action);
-        I.m_memory += action->memory();
-        LOG("History: %.2f KB", I.m_memory / 1024.f);
-    }
-    static void undo()
-    {
-        I.m_actions.top()->undo();
-        I.m_memory -= I.m_actions.top()->memory();
-        I.m_actions.pop();
-        LOG("History: %.2f KB", I.m_memory / 1024.f);
-    }
+    static void add(Action* action);
+    static void undo();
     static bool empty()
     {
         return I.m_actions.empty();
diff --git a/engine/app.cpp b/engine/app.cpp
index b6a385b..4375a66 100644
--- a/engine/app.cpp
+++ b/engine/app.cpp
@@ -584,6 +584,15 @@ void App::initLayout()
                 }
             };
         }
+        if (auto* button = layout[main_id]->find<NodeButton>("btn-anim"))
+        {
+            button->on_click = [this,button](Node*) {
+                if (canvas)
+                {
+                    //canvas->m_canvas->export_anim(data_path);
+                }
+            };
+        }
         if (auto* button = layout[main_id]->find<NodeButton>("btn-open"))
         {
             button->on_click = [this,button](Node*) {
@@ -946,3 +955,14 @@ void App::terminate()
     color->clear_context();
     stroke->clear_context();
 }
+
+void App::update_memory_usage(size_t bytes)
+{
+    if (auto txt = layout[main_id]->find<NodeText>("txt-memory"))
+    {
+        static char buffer[128];
+        sprintf(buffer, "History memory: %.2f Kb", bytes / 1024.f);
+        txt->set_text(buffer);
+        layout[main_id]->update();
+    }
+}
diff --git a/engine/app.h b/engine/app.h
index 41ace1a..5c1aaf0 100644
--- a/engine/app.h
+++ b/engine/app.h
@@ -50,6 +50,7 @@ public:
     void create();
     void terminate();
     void clear();
+    void update_memory_usage(size_t bytes);
     void update(float dt);
     void resize(float w, float h);
     bool mouse_down(int button, float x, float y);
diff --git a/engine/canvas_modes.cpp b/engine/canvas_modes.cpp
index ef5e4ac..967e4d1 100644
--- a/engine/canvas_modes.cpp
+++ b/engine/canvas_modes.cpp
@@ -220,6 +220,8 @@ void CanvasModeGrid::on_MouseEvent(MouseEvent* me, glm::vec2& loc)
             break;
         }
         case kEventType::MouseCancel:
+            if (m_dragging)
+                m_lines.pop_back();
             m_dragging = false;
             node->mouse_release();
             break;
@@ -280,13 +282,7 @@ void CanvasModeFill::init()
 
 void CanvasModeFill::leave()
 {
-    auto drawer = [this](const glm::mat4& camera, const glm::mat4& proj) {
-        ui::ShaderManager::use(ui::kShader::Color);
-        ui::ShaderManager::u_mat4(ui::kShaderUniform::MVP, proj * camera);
-        ui::ShaderManager::u_vec4(ui::kShaderUniform::Col, { node->m_brush.m_tip_color.rgb(), node->m_brush.m_tip_opacity });
-        m_shape.draw_fill();
-    };
-    canvas->draw_objects(std::bind(drawer, std::placeholders::_1, std::placeholders::_2));
+    canvas->draw_objects(std::bind(&CanvasModeFill::on_Draw, this, glm::mat4(), std::placeholders::_1, std::placeholders::_2));
     m_points.clear();
 }
 
@@ -351,9 +347,12 @@ void CanvasModeFill::on_MouseEvent(MouseEvent* me, glm::vec2& loc)
         break;
     }
     case kEventType::MouseCancel:
+        if (m_dragging)
+            m_points.pop_back();
         m_dragging = false;
         node->mouse_release();
-        m_points.clear();
+        if (m_points.size() < 4)
+            m_points.clear();
         break;
     default:
         break;
diff --git a/engine/rtt.cpp b/engine/rtt.cpp
index e998aa5..443eed1 100644
--- a/engine/rtt.cpp
+++ b/engine/rtt.cpp
@@ -25,6 +25,7 @@ void RTT::destroy()
     {
         unbindTexture();
         glDeleteTextures(1, &texID);
+        LOG("TEX rtt destroy %d", texID)
     }
     if (fboID)
     {
@@ -32,6 +33,7 @@ void RTT::destroy()
         glDeleteFramebuffers(1, &fboID);
         LOG("RTT DESTROY %d", fboID);
     }
+    texID = 0;
     fboID = 0;
     rboID = 0;
 //    w = 0;
@@ -49,6 +51,7 @@ bool RTT::create(int width, int height, int tex/* = -1*/)
     if (tex == -1)
     {
         glGenTextures(1, &texID);
+        LOG("TEX rtt create %d", texID);
     }
     else
     {
diff --git a/engine/rtt.h b/engine/rtt.h
index 83efdbd..6972b14 100644
--- a/engine/rtt.h
+++ b/engine/rtt.h
@@ -4,9 +4,9 @@ class RTT
 {
     bool bound = false;
     GLint oldFboID = 0;
-    GLuint fboID;
-    GLuint rboID;
-    GLuint texID;
+    GLuint fboID = 0;
+    GLuint rboID = 0;
+    GLuint texID = 0;
     int w;
     int h;
 
diff --git a/engine/texture.cpp b/engine/texture.cpp
index 4e4e59c..e02158a 100644
--- a/engine/texture.cpp
+++ b/engine/texture.cpp
@@ -41,7 +41,7 @@ bool Texture2D::create(int width, int height, GLint internal_format, GLint forma
     m_format = format;
     m_iformat = internal_format;
     glGenTextures(1, &m_tex);
-    LOG("genTex %d", m_tex);
+    LOG("TEX create %d", m_tex);
     bind();
     glTexImage2D(GL_TEXTURE_2D, 0, internal_format, width, height, 0, format, GL_UNSIGNED_BYTE, data);
     unbind();