# Invoke Assistant

The LangGraph Studio lets you test different configurations and inputs to your graph. It also provides a nice visualization of your graph during execution so it is easy to see which nodes are being run and what the outputs of each individual node are.

1. The LangGraph Studio UI displays a visualization of the selected assistant.
    1. In the top-left dropdown menu of the left-hand pane, select an assistant.
    1. In the bottom of the left-hand pane, edit the `Input` and `Configure` the assistant.
    1. Select `Submit` to invoke the selected assistant.
1. View output of the invocation in the right-hand pane.

The following video shows these exact steps being carried out:

<video controls allowfullscreen="true" poster="../img/studio_input_poster.png">
    <source src="../img/studio_input.mp4" type="video/mp4">
</video>
