Trimming IPTV list

[Soapm]

Is there an easier way of trimming an IPTV list? I think this last time I chose three categories but I still end up with hundreds of channels when I really need only a few. I bring up the list where you can uncheck the boxes but there's no save function that I can see so the channels remain active? Is there an easy way to pick 5 or 6 channels?