Greetings Opi
Long weekend in Australia and I am happily burrowing into my Opus stuff.
Question - Is it accurate to say this button is not accessibly either via internal command or script?
It does nto seem like it just thought I would check as you never know with DO 
See below. You need to hit F3 to bring up the utility panel and then maybe change the pulldown to Script Output.
Reason:
I am having need to save DOpus Outputs alot at the moment.
It would help me if I could create my own button or hotkey.
It seem this question have been touched on before.
This post is relevant:
A way to automatically save script output to a file
And this looks especially interesting:
Helper: XLog (versatile logging approach for DO scripting)
I will have to look into that another day....