diff --git a/PanoPainter/GameViewController.m b/PanoPainter/GameViewController.m
index 3f7b2ed..02d4cc8 100644
--- a/PanoPainter/GameViewController.m
+++ b/PanoPainter/GameViewController.m
@@ -97,13 +97,13 @@ std::recursive_mutex lock_mutex;
     std::string path = [chosenImage cStringUsingEncoding:NSUTF8StringEncoding];
     p->callback(path);
     [picker dismissViewControllerAnimated:YES completion:^{
-                    [self keyboardWillBeHidden:nil];
+                    [self keyboardWasHidden:nil];
                 }];
 }
 - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
 {
     [picker dismissViewControllerAnimated:YES completion:^{
-                    [self keyboardWillBeHidden:nil];
+                    [self keyboardWasHidden:nil];
                 }];
 }
 
diff --git a/src/asset.cpp b/src/asset.cpp
index 147f1c6..9ec6b56 100644
--- a/src/asset.cpp
+++ b/src/asset.cpp
@@ -171,7 +171,7 @@ glm::uint8_t* Asset::read_all()
         if (m_len != fread(m_data, 1, m_len, m_fp))
         {
             LOG("ASSET READ FAILED for %s", m_current_path.c_str());
-            delete m_data;
+            delete[] m_data;
             m_data = nullptr;
         }
     }
diff --git a/src/canvas_modes.cpp b/src/canvas_modes.cpp
index b56f20e..5ccf348 100644
--- a/src/canvas_modes.cpp
+++ b/src/canvas_modes.cpp
@@ -869,11 +869,11 @@ void CanvasModeTransform::enter()
         if (m_source_image.data())
         {
             m_tex[0].create(m_source_image);
-            aspect = m_source_image.width / m_source_image.height;
+            aspect = (float)m_source_image.width / (float)m_source_image.height;
         }
 
         auto center = zw(canvas->m_box) * 0.5f;
-        glm::vec2 bb_sz = glm::vec2(aspect, 0.75f) * 100.f;
+        glm::vec2 bb_sz = glm::vec2(aspect, 1.f) * 100.f;
         glm::vec2 bb_min = center - bb_sz * 0.5f;
         glm::vec2 bb_max = center + bb_sz * 0.5f;
         glm::vec2 midpoint = (bb_min + bb_max) * 0.5f;
@@ -1221,7 +1221,7 @@ void CanvasModeTransform::on_Draw(const glm::mat4& ortho, const glm::mat4& proj,
         auto c2d = (xy(c3d) * 0.5f + 0.5f) * zw(canvas->m_box);
 
         ui::ShaderManager::u_mat4(ui::kShaderUniform::MVP,
-            ortho * glm::translate(glm::vec3(c2d, 0)) * glm::scale(glm::vec3(10.f)));
+            ortho * glm::translate(glm::vec3(c2d, 0)) * glm::scale(glm::vec3(20.f) * App::I.zoom));
 
         // draw inside
         ui::ShaderManager::u_vec4(ui::kShaderUniform::Col, { 1, 1, 1, i == corner_hl ? 1.f : .1f });
@@ -1248,8 +1248,19 @@ void CanvasModeTransform::on_MouseEvent(MouseEvent* me, glm::vec2& loc)
     break;
     case kEventType::MouseUpL:
         m_dragging = false;
+        corner_hl = -1;
         break;
     case kEventType::MouseDownL:
+        corner_hl = -1;
+        corners2d.resize(corners.size());
+        for (int i = 0; i < corners.size(); i++)
+        {
+            auto c = m2d * glm::vec4(corners[i], 1);
+            corners2d[i] = ((xy(c) / c.z) * 0.5f + 0.5f) * zw(canvas->m_box);
+            float d = glm::distance(corners2d[i], loc);
+            if (d < 20.f * App::I.zoom)
+                corner_hl = i;
+        }
         if (corner_hl != -1)
         {
             m_dragging = true;
@@ -1273,7 +1284,7 @@ void CanvasModeTransform::on_MouseEvent(MouseEvent* me, glm::vec2& loc)
             auto c = m2d * glm::vec4(corners[i], 1);
             corners2d[i] = ((xy(c) / c.z) * 0.5f + 0.5f) * zw(canvas->m_box);
             float d = glm::distance(corners2d[i], loc);
-            if (d < 10)
+            if (d < 20.f * App::I.zoom)
                 corner_hl = i;
         }
         if (m_dragging)