How to set up an alias

I’m using a Beryl (GL-MT1300) and cannot seem to find the means to set up an alias for one of the connected devices. I’m setting up a music server to use for a party and want to make it easy for guests to connect by typing the alias in their browsers to resolve the direct address.

Can anyone offer some assistance on where I find that in the control panel/luci panel?

There is no this function.

Adding to firmware v4.x now

Thanks! I’ll stop looking for it now and wait for the updated firmware. I believed that I was going mad, not being able to find it.