The manufacturer example selects one port
Samsung’s setup guidance enables Input Signal Plus for the HDMI port connected to the external device. It is not simply a television-wide label that proves every input is configured identically.
Although the cited example concerns Xbox, the useful documented distinction here is the selected input. This article does not infer IPTV-player support or a tested HDR result from a console setup page.
Map the cable before changing the setting
Identify the actual socket and input used by the source. Use the TV model’s documented External Device Manager and Input Signal Plus route where supported. Select the correct port and follow the manufacturer prompts.
If the source has been moved to another socket, inspect that input again. Keep source output and TV picture processing stable during the comparison.
Keep capability claims separate
Enabling an input feature does not create an HDR source or prove every cable and receiver supports the desired mode. Review the entire route for the actual viewing requirement.
For support, supply the television model, HDMI port and selected input state. This makes the question concrete without applying a US model example as a universal European menu guarantee.
Questions answered
Can moving to another HDMI input change the relevant setting?
Check the new port; Samsung’s example selects the connected HDMI input specifically.
Does this establish a programme’s HDR format?
No. It concerns the TV input configuration, not the source media.
Sources & further reading
Official references for the subjects discussed. Service terms and device software can change.