Asus X450JF - Manual (Page 49)

Notebook PC E-Manual 
Hotspot Action
upper left corner Hover your mouse pointer on the upper left
corner then tap on the recent app’s thumbnail
to revert back to that running app.
If you launched more than one app, slide
down to show all running apps.
lower left corner From a running app screen:
Hover your mouse pointer on the lower
left corner then tap on the Start screen’s
thumbnail to go back to the Start screen.
NOTE: You can also press the Windows key
on your keyboard to go back to the
Start screen.
From the Start screen:
Hover your mouse pointer on the lower
left corner then tap on the running app’s
thumbnail to go back to that app.