Van basic question

I have 2 vlans set up on ports 3 and 4. They are also bridged and trunked to port 5.

I would like to add 2 more vlans, but I don’t want them on physical ports. I just want them available on the trunk port 5.

Can you add vlans without assigning them to a physical port, and if so, what is the best way to do it?

Thanks.

I believe they have to be interfaced with a physical or possibly logical port (other VLAN). Why don’t you want to just attach your other VLANS to your trunk port 5?