Hello,
The feature you are looking for was added in 3.5 beta:
你好，
您正在寻找的功能已在3.5 beta中添加：
Spine: Changelog: v3.5.00 beta
Therefore, if you downgrade to Spine 3.3.07 this feature won't be available, as this version came before the feature was introduced.
因此，如果您降级到Spine 3.3.07，则此功能将不可用，因为此版本是在引入该功能之前提供的。
