User Manual

3. Configure the Display
(You can also visit website https://support.apple.com/en-sg/HT202351)
Use extended desktop mode
Maximize your workspace with extended desktop mode, which lets you
enjoy full-screen apps and windows on each monitor. Then, use Mission
Control to organize apps and windows across your displays. If your
Dock is on the bottom of your screen, it appears on any of your displays
when you move your pointer to the bottom edge of your display.
Turn on extended desktop mode
Make sure that your external display is powered on and connected to
your Mac.
Choose Apple () menu > System Preferences, then click Displays.
Select the Arrangement tab.
Make sure that the Mirror Displays checkbox isn’t selected.