UPK 11.1 ESP 2 introduced a new Play Mode Appearance. Now that UPK 12.1 has introduced Skins, this is now available as a Skin document named "Gray".
Steps:
The Gray Skin is available in the Library folder System/Publishing/Styles.
Click the Browse... button.
Step 1Double-click the System cell.
Step 2Double-click the Publishing cell.
Step 3Double-click the Styles cell.
Step 4Click the Gray cell.
Step 5Click the Open button.
Step 6Click the Publish button.
Step 7Click the C:\Users\msantosu\Documents\Gray Player\Publishing Content\PlayerPackage\Play.exe link.
Step 8Click the OK button.
Step 9Click the Try It! object.
Step 10The Gray Skin has been applied to our published Player.
Step 11
The Gray Skin provides an alternative style for your Player bubbles and is now a simple selection in the publishing wizard.