Opting in to the Steam Client Beta lets you use the latest features before they're released.Please follow the instructions below to participate in the Steam client beta:With Steam running, click on "Steam" in the upper left, then choose the "Settings" menu. (Preferences on Mac)On the "Account" tab under "Beta Participation" click the "Change..." button.Select the "Steam Beta Update" from the drop down list and click "OK".You will be prompted to restart Steam, please select the "Restart Steam" button.If you are using Big Picture Mode:Select 'Settings' then 'System'Check the ‘Participate in client beta’ optionFollow the prompt to restart Steam