ZMODO ZP-IBH13-P 720P HD H.264 PoE IP Infrared Weatherproof Camera with QR Code Smartphone Setup - Zviewer Windows User Manual - Manual (Page 21)

Left click the weekday(i.e. ) to set the recording plan for the
whole day
Left click 0 to 24 area of the timeline to set the recording plan for
the same time period of the whole week
2.Click the device allocated for the recording plan to select, one or
more devices can be selected and then click the【Save】 button.
Double click any device to check its recording plan.