> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dwe.ai/llms.txt
> Use this file to discover all available pages before exploring further.
# Controller Overview
> This overview will cover how to use the Controller widget.
This is the **Controller** dock, which is responsible for executing functions on all panels in the Stream Viewer.
You can drag or click on the **Grip** on the far left of the dock.
The dock will automatically hide itself when you are not using it. Hover over the dock to reveal.
You can click on the **Grip** to
collapse the dock.
## Quick Functions
These show up when you have a global command available to you. Select a section below to learn more:
Start or stop streaming on all cards at once.
Start or stop recording on all active streams.
Show or hide the config box on every card.
Snapshot all currently streaming cards.
Evenly distribute all cards across the Stream Viewer.
Remove all video cards from the Stream Viewer.