Reolink POE NVR
To change output resolution, make sure the NVR firmware version is later than 161209 and client version is 18.104.22.168 or above
Step 1. Login the PoE NVR via Reolink client, it’s the same method as adding Reolink cameras into the Reolink client.
Step 2. Click on “Device Settings” on NVR device and entry “Output”
Step 3. You can change the output resolution on this tab, NVR will restart after you change the setting.