Home
On your computer, look for “Settings” on the left menu and click it as directed by the arrow from the figure below.
You will be taken to the “Windows Settings” page.
Click on “Ease of Access” as directed by the arrow from the figure below.
You will be taken to Display screen.
Click as directed by the arrow from the figure below.
You can now choose required time to show Notifications for longer duration as shown in the figure below.