diff --git a/src/text_editor/lua_api.cpp b/src/text_editor/lua_api.cpp
index afb30fe..1cf4fba 100644
--- a/src/text_editor/lua_api.cpp
+++ b/src/text_editor/lua_api.cpp
@@ -85,6 +85,21 @@ int LuaListWindows(lua_State *L) {
     return 1;
 }
 
+int LuaOpenBigBuffer(lua_State *L) {
+    Window *window = GetWindow(GetLastActiveWindow());
+
+    // @todo: ViewOpenBuffer - new or old view for specified buffer
+    Buffer *buffer = CreateBuffer(GetSystemAllocator(), "big", 2500000 * 4);
+    LoadBigTextAndBigLine(buffer);
+    View *view = CreateView(buffer->id);
+
+    AddView(window, view->id);
+    window->active_view = view->id;
+
+    SetActiveWindow(window->id);
+    return 0;
+}
+
 void InitLua() {
     LuaState = luaL_newstate();
     luaL_openlibs(LuaState);
@@ -100,6 +115,9 @@ void InitLua() {
 
     lua_pushcfunction(LuaState, LuaListWindows);
     lua_setglobal(LuaState, "list_windows");
+
+    lua_pushcfunction(LuaState, LuaOpenBigBuffer);
+    lua_setglobal(LuaState, "open_big_buffer");
 }
 
 String16 EvalString(Allocator allocator, String16 string16) {
diff --git a/src/text_editor/text_editor.cpp b/src/text_editor/text_editor.cpp
index 62bc864..2d11391 100644
--- a/src/text_editor/text_editor.cpp
+++ b/src/text_editor/text_editor.cpp
@@ -152,7 +152,7 @@ int main(void) {
 
         Rect2I screen_rect       = GetScreenRect();
         Rect2I infobar_rect      = CutBottom(&screen_rect, (Int)FontLineSpacing);
-        float  line_numbers_size = MeasureTextEx(MainFont, "12345", (float)FontSize, (float)FontSpacing).x;
+        float  line_numbers_size = MeasureTextEx(MainFont, "1234567891", (float)FontSize, (float)FontSpacing).x;
         {
             int i = 5;
             if (Windows[i].visible) {
diff --git a/src/text_editor/window_draw.cpp b/src/text_editor/window_draw.cpp
index b7162a9..869648f 100644
--- a/src/text_editor/window_draw.cpp
+++ b/src/text_editor/window_draw.cpp
@@ -216,7 +216,7 @@ void DrawWindow(Window &window) {
             Vec2     p      = ToVec2(pos);
             float    rectx  = (float)GetSize(r).x;
             p.x += (rectx - x) / 2.f;
-            if (x > rectx) p.x = 0;
+            if (x > rectx) p.x = (float)r.min.x;
             DrawString(MainFont, string, p, (float)FontSize, (float)FontSpacing, ColorTextLineNumbers);
         }