Now it is clear, thanks. So you basically request the following scheme:
placement1 = <default pos for editor#1>
placement2 = <default pos for editor#2>
...
placement.uid[someuid1] = <pos for note with uid 1, takes precedence over placementN>
placement.uid[someuid2] = <pos for note with uid 2, takes precedence over placementN>

Is that correct?

Not at the same time, of course. Here's an example:
placement1.uid[1] = (0, 0, 100, 100)
placement2.uid[1] = (50, 50, 150, 150)

Now if you open the note with uid[1] as the first editor, it will be shown at (0, 0, 100, 100), but if another note is already open, it will be shown at (50, 50, 150, 150).

Any why not HTML? It's ok to have it inside of string literals.

Sorry for being slow here, I can't quite follow you.. So you suggest to keep placement1, placement2, etc, but also add the uid to it, so that we have placement1.uid1, placement1.uid2, placement2.uid1 ? Please keep in mind that placement2 = "second editor window". So that the one and same note can be opened at different positions depending on if there's already another editor window open. I guess this is not what you want, or maybe I'm wrong?

Thanks for the idea, Jww! Indeed tagging with middle-click is not as convenient as it could be.

Do I understand correctly that if you open and close all notes one by one, then for each note UID an entry will be added to cintanotes.settings?

Hi Maxwell, 
thanks a lot for your comment. Since our resources are very limited, we generally put into the pipeline only issues with 10+ votes (save the issues which are trivial). This issue will be difficult to fix, probably we'll need to refactor the whole graphics subsystem, hence we need to see the demand expressed in votes. Hope you understand!