The code was already pretty much there since 2012 but was left disabled. @Sergey Sharybin (sergey) Sharybin (sergey), is there any issue that caused you to keep it disabled?

Were too much intrusive changes already, also needed good interface decision to be really helpful.

The current patch i don't find particularly useful for artists: it makes saving your image a gamble. You would never know whether your settings are actually ruining the look of the image.
It also doesn't facilitate way more common request: being able to save files in a color space different from scene linear one. To me it seems exposing a lot of settings which will almost never be used.

But even if others find this specific feature useful, it doesn't work that great and have bugs:

• File Save allows you to color space settings for any image, not only for rendered one. So if you open PNG, hit Image -> Save a Copy, choose "False Color" and save another PNG, none of the transform is applied.
• initialization of color management from scene for opened images is wrong: you don't want to apply Filmic by default when saving textures.
• Changing Display Device does not update list of available views.
• Outcome from previous one: trying to save render in XYZ display ends up in abort: this is because color management is asked for Filmic view which does not exist for XYZ.