Hi Slobodan, I understand the nature of the uncertainties you mention, but I approached the subject from a different perspective, largely because I see this kind of posting occurring on the forum more and more frequently. I have no doubt that for the OP it was a perfectly innocent attempt to get some quick answers, because he mistakenly thought that what he wants to get a grip of is amenable to quick answers. So whatever precisely he meant by the terms he used in a way doesn't matter to the basic issue that he is at a stage where - much like how most of us started down this path - he doesn't know what he doesn't know, but really should know to address his legitimate concerns satisfactorily. It struck me immediately that he needed some in-depth tuition, to which I pointed him, and I am pleased to note he recognizes that need. So all to the good.
I add in general - a great many "new topics" are generated by people who haven't researched whether there are already answers - for example I've lost track of the number of people for whom I and others pointed them to Andrew Rodney's tutorial on "why are my prints too dark", because the same "problem" keeps being raised over and over and over again. Well, everyone is free to ask what they want of course, but LULA is great resource, and there are others on the internet also ranging from free to inexpensive, for answering a high percentage of the stuff that comes up as "new topics". I guess my general message is to encourage newcomers to do more research and open new topics on aspects of their problems for which they haven't found answers and are amenable to a Forum format of assistance. Needless to say here (but I'll say it anyhow) the search tools we have allow people who know next to nothing to get very deeply into all kinds of stuff without needing to write a word, and the price of a LULA tutorial is a small fraction of the cost of paper and ink many would waste if they had not given themselves access to this knowledge. So that's where my mind was when this topic crossed my screen today.
Cheers,
Mark