What is this Output-entry in D&P?

[sinus]

Hi Mario
See my attachement.
If I do an output as a image (what I do seldom), at the bottom is an entry, but I can not see, for what this is.

I guess, this is a "Überbleibsel" (remaining) of some planned entry, what should not be there?
Or have I overseen something?

[Mario]

It becomes enabled when you output to a color profile different than sRGB.
You select a color profile to embed there.

[sinus]

Ah, thanks, Mario.
I tried this, I tried Adobe RGB, sRGB and ProPhoto RGB, did not change.

What I have not tried, is Custom RGB. It works, if I choose a custom RGB.

Sorry, thanks for make this clear. 

[Mario]

This is only available when you choose custom profile to load your own color profile from disk.