Remote control button function as follow

ENGLISH

1	POWER	Power ON/OFF
2	MTS	Select Mono, Stereo or SAP in TV / Select audio language
		in DTV
3	INFO	Display current information
4	SLEEP	Set TV Sleep timer
5	SOUND	Select sound modes
6	0~9, 100/- number button	Directly channel select
7	VOL+ and VOL-	Adjust volume UP/DOWN
8	GUIDE	Show electronic program guide (EPG)
9	FAV.A/D	To skip or restore Favorite Channels
10	UP/ DOWN /LEFT/ RIGHT/	UP/ DOWN/ LEFT/ RIGHT: Navigate and adjust OSD
	ENTER	function
		ENTER: Enter the function setting
11	INPUT	Input source select
12	ZOOM	Adjust window size
13	FREEZE	“Freeze-Frame” the current screen
14	P. POS	Adjust sub-screen window position
15	C.C	Displaying captions during closed caption source and
		closed caption mode select
16	P.SIZE	Adjust sub-screen window size
17	MUTE	Volume mute ON/OFF
18	TV/DTV	Swap between TV/DTV. Swap to TV when in other source
19	PICTURE	Select picture modes
20	RETURN	Return to previous channel
21	CH▲ and CH▼	Adjust Channel UP/DOWN
22	FAV. CH	Select from preset Favorite Channels
23	MENU	On Screen Display (OSD) menu ON/OFF
24	WIDE	Change the image size
25	PIP/POP	Toggle to enable/disable Picture in Picture/Picture Out of
		Picture function
26	P.INPUT	POP/PIP input source select
27	V-CHIP	Set V-Chip rating
28	SWAP	Switch between main screen and sub-screen

Note: PIP means Picture In Picture. POP means Picture Out Of Picture.

ViewSonic

N3251w

ViewSonic N3251w manual Remote control button function as follow