I’ve been using RawTherapee since 2015 for developing .PEF files. While not being related to programming in my line of work (or the way I make living, to be correct) I was looking for open source raw editor that can run on Linux . I tried out quiet a few programs back then, beginning from Light Room (via Virtual machine) to the Dark Table , I stopped searching when I found the RawTherapee. I fell in love with it and never left it since then. RawTherapee is a beautiful creation. Since the program is under constant development and getting more sophisticated all the time, I feel the need to acquire more information about different functions and ways users resolve arising questions.