Hisense HK570 User Manual page 17

4. On The following dialog window 'Change display appearance of your display'
'Display' option is set as '1|2. Multiple Monitor' and'Multiple display (M) option is
set as duplicate these displays. (In this case, the dual monitor shows a duplicated
screen.)
5. If you want to change to an extended screen, set 'Multiple displays' option as
'Extend these displays' on 'Change the appearance' of you display dialog window.and
click "ok" (In this case, two different extended screen monitors are shown.)