Setting one machine as 'master'

Support
1

How do I set one machine as ‘master’ so any changes made on that machine are rolled out to subsequent machines but not vice versa?

2

https://docs.syncthing.net/users/foldertypes.html#send-only-folder

3

Thanks, now on the flip side - I see no option for setting a folder to receive only. Is there a slave feature?

4

No

5

There is a quite lengthy thread on the topic of receive-only folders in case you want to join the discussion (or the development).