网站访问者在浏览您网站上的任何网页时都会触发 page_view 事件，但您想要定义一个新事件，让它在访问者进入像首页这样的特定网页时触发。在 Google Analytics 界面中找到“事件”后，您可以选择下面哪个选项来定义此首页查看事件？

To define a new event like a homepage view, you would use the "Create event" option in the Google Analytics interface. This feature allows you to specify conditions (e.g., page path equals '/home') that, when met, will trigger a new custom event. "Mark as key event" is used to designate an existing event as a conversion. "Modify event" is for changing the parameters or conditions of an existing custom event, not for creating a new one from scratch. "Import event" is not a standard option for defining new events within the GA4 interface; event definitions are typically created directly or imported through API/configuration.