Missed buttons Design, Split and Code in Visual Studio 2010
![Turn on HTML designer in Visual Studio 2010](https://markimarta.com/wp-content/uploads/2013/05/missed-buttons-vs-02-150x150.png)
If your buttons Design, Split and Code in Visual Studio 2010 are missed but you need them, you should go to Tools->Options->HTML Designer->General, check "Enable HTML Designer" and restart studio.
if you want to disable these buttons, you should uncheck this item.