Is there any trick to trigger a script when a layout is left - rather than when it is loaded? Apart from assigning the script, on layout load, to every possible layout the user might go to (not a comfortable option).

How are the users leaving the layout? What are you trying to achieve here?

Trigger a script on record commit, perhaps.

I wish that were the solution...

I'm trying to have a button be visible (conditionally formatted) and usable when the user arrives from a specific location under specific conditions. He should be able to make changes in the record (and therefore commit records) and browse other records without affecting the button. The button would be called "return" and would take him back (not a simple matter of go-to-layout). However if he chooses to do something else, go elsewhere, the button should then become disabled and invisible so that it is no longer active on that layout.

It isn't a life-or-death function, but it would be nice. Not worth having a second layout just for the purpose either.

Is there any trick to trigger a script when a layout is left - rather than when it is loaded? Apart from assigning the script, on layout load, to every possible layout the user might go to (not a comfortable option).

Yes.

FileMaker 11 provides the On layout Exit script trigger.

Thank you Bruce! Time to update...