Click on the personal avatar, message settings, and set the style to a heart shape.

Specific steps:

1. We need to start the "Ball Battle" client.

2. Click on the personal avatar to enter the message settings.

3. Open the settings in the upper right corner, select the second option, and set the style of the message box to a heart shape.

"Ball Battle" is a very fun mobile online game created by Giant Network. In this world of balls, everyone is transformed into a unique ball. The big ball eats the small ball.