LG 55LW9800 Owner's Manual page 35

Color buttons
These access special functions in some menus.
Control buttons
Controls the Premium contents, Smart Share menus, or the SIMPLINK
compatible devices (USB, SIMPLINK).
FREEZE ( )
Freezes the current frame (Not supported when using USB Mode and
Simplink).
SIMPLINK (See p.117)
Accesses the AV devices connected to the TV;
Opens the SIMPLINK menu.
RATIO (See p.45)
Resizes an image.