How can Janet open Notifications on her iMac?

The method for opening Notifications on an iMac involves clicking the Notifications icon in the menu bar. This icon typically appears in the upper right corner of the screen and looks like a bell. When Janet clicks on this icon, she can view her notifications, including app alerts, system updates, and other important notifications.

Using the Open command under the View menu is not applicable here because notifications are not accessed through a traditional menu interface. The Command-Shift keyboard command does not correspond with any functionality for accessing notifications, as keyboard shortcuts for macOS largely involve different combinations for specific tasks. Additionally, choosing "About This Mac" from the Apple Menu provides system information but does not facilitate access to notifications at all. Therefore, clicking the Notifications icon in the menu bar is the correct and most direct way to view notifications on an iMac.