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. StreamYard: Paste the copied link in a new Browser. Open your StreamYard Studio, and click on Share Screen button in the bottom. Choose Chrome Tab > LiveReacting Studio, and click Share.
5. Make sure to launch your stream in StreamYard first, and only then start the giveaway it in the LiveReacting Studio.
To ensure that the giveaway fills the entire screen without being cut off, adjust the tab with the giveaway to make it narrower until the proportions are 16:9. This way, you will not have white bars in the stream, and the giveaway will take up more space.