See more details: Click the notification to open the item in the app. For example, to reply to a call using the Messages app, click the arrow next to Decline, then choose Reply with Message. If an action has an arrow next to it, click the arrow for more options. For example, click Snooze in a notification from the Calendar app, or click Reply in a notification from the Mail app. To expand the stack and see all of the notifications, click anywhere in the top notification. On your Mac, move the pointer over a notification, then do any of the following:Įxpand or collapse a stack of notifications: If an app’s notifications are grouped, multiple notifications are stacked.