Supported Platforms:
For players on "Vanilla" or Classic Era servers, the process is more straightforward as the option still exists within the standard user interface. Press to open the Game Menu. Select Interface . Click on the Combat tab on the left-hand side. Locate the Floating Combat Text section. Check the box labeled Combat Damage . Using Addons for Enhanced Visuals
Toggle the following settings :
/console floatingCombatTextCombatHealing 1