# Session Window: VQL, MDL

Once logged in, you can work in the Session Window in any of the following editors/views:

![Session Window View Options](https://content.gitbook.com/content/Tm33LjoydNGJU9PfUTFj/blobs/CMfjurozcBKpS8O2H9Jg/Capture.PNG)

* **VQL**: edit & run VQL queries
* **MDL**: edit & run MDL statements and scripts

You can switch anytime between these views using the above toolbar buttons or the **View** menu. Changing the view does not delete any existing commands or results in other views; moreover, during script debugging, you can execute commands in other views without stopping the debug process.

You can use the below toolbar buttons to execute your VQL queries/MDL commands/scripts. It is possible to run/step into/pause/stop VQL queries/MDL scripts.

<figure><img src="https://content.gitbook.com/content/Tm33LjoydNGJU9PfUTFj/blobs/hWSW3BAL5AqbmAE7QP34/image.png" alt=""><figcaption><p>Toolbar buttons for running and controlling execution of VQL and MDL code</p></figcaption></figure>

{% hint style="info" %}
Note that some of the above commands may not be available depending on the type of code being executed and/or if execution times are too short for the user to interact with the buttons during runtime.
{% endhint %}