Petermoncrieff : Depending which FL you use, I have 4, the only one I can get that remains stable (no need to register) and in 4 its called Edit Events, I just checked out what Minds was on about and I came to the conclusion that the same thing is called 'Create Automation' in the latest versions of FL.
4 also has a 'link to controller...' right menu choice which I presume is also in the latest versions, this enables one button to be controlled by another buttons event/automation!