1. Create or customise a Giveaway in LiveReacting.
2. Open created Giveaway project and click on Settings (Gear Icon).
3. Activate the plugin and copy the URL.
4. Open your Ecamm Studio and click on a planet icon on the left side bar. Enter the copied URL in the widget, fill out the width and height fields (1280 x 720) and click on Add Widget Overlay. The layer with Giveaway will be invisible and won't start until you launch it in LiveReacting.
5. Finally, make sure to launch your stream in Ecamm first, and only then start the giveaway it in the LiveReacting Studio.