1# Common Events of the Window Management Subsystem 2This document lists the common system events provided by the window management subsystem to applications. Applications can use [APIs](../js-apis-commonEventManager.md) to subscribe to common system events. 3 4### COMMON_EVENT_SPLIT_SCREEN<sup>10+</sup> 5Indicates a screen splitting action. 6 7- Value: usual.event.SPLIT_SCREEN 8- Required subscriber permissions: none 9 10When any of the following actions is performed, the event notification service is triggered to publish this event: accessing the recent tasks screen, creating a split-screen bar, and destroying a split-screen bar. 11