I'm not using the AP on daily basis, thus using a lot of time to find out how to proceed.
AP is very versatile on vast selection of all kind of useful features. All are described only for WHAT but not for HOW.
That's why I'm now asking help to probably a very simple task, but HOW:
Example tasks
1) Old slide scans with strong change in colour balance which can not be corrected by white balance adjustment, but using histogram level adjustment the correction can be done in most cases perfect.
2) A bunch of photos shooting through coloured window (thermal filtering e.g. in skyscrapers), process is about the same as in case above.
How to save the level settings and how to automate the adjustment to the rest of the same batch?