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2) The button [AUTO] is used to adjust position of picture automatic and it is effective only onVGA mode. The button [POSITION] is used to adjust the position ofpicture. The button [CLOCK] and [PHASE] can adjust quality of picture minutely, and they are used less. Auto Clock Phase Position I/p info 3) In HDTV mode ,Clock can not be select. 4) In DVI mode,I/P info can be select only. Teletext Operations Selecting teletext mode Select the channel that is broadcasting the desired Teletext program.