Samsung UN50H5203AF

I have a UN50H5203AF Smart TV that I want to use to play media from my laptop using Serviio, but I cannot find anything in the Smart Hub to do it, even though I've added the TV to Serviio on my laptop. I've had this TV for some time, but never tried this before, but want to do it now that we have moved it to another location. Meanwhile, I've been playing media from my laptop on my newer UN55MU6300F Smart TV using Serviio for some time with no problems, but the UN55MU6300F has a more comprehensive Smart Hub Menu and Serviio is in "Sources". The Smart Hub menu for the older UN50H5203AF is very rudimentary and minimal and doesn't show Sources. What am I missing?

[atc98092]

If you press the Source button on the TV remote, Serviio should appear as one of the options. Let me know if you don't see it.

Thank you! The remote Source button works. At first I thought it didn't, but it took a few seconds for Serviio to appear in the sources. I was expecting Sources to just appear in the smart hub screen menu like on my newer UN55MU6300F.