I am trying to look at existing filemaker projects in order to understand how the system works. I am fairly new to this and I am trying to understand how things work. Usually what I do is find an interesting concept and try to recreate it in order to understand how it works. The last few days I have been trying to recreate the file called (BookingSystem_9-3.fmp12), I realise its just a demo but its a concept I want to understand. The part that I don't understand is how the system removes the different room options from the portal. I think it has something to do with relationships, so I tried it on my own file (testbooking.fmp12) where I played around a bit but it cant work, can someone please help!!!