Question about paragraph justification

[zamolxe]

This is one of the prime examples where one can suspect that the first characters of lines were put down first of all.

That, of course, implies that an exemplar was used, or at the very least, a rough draft.
I was researching this when I came across your site, Rene - as always, you're one step ahead 
Irrespective of this, I was wondering if this style of layout could be used to narrow down a possible geographical location, or scribal tradition, for the scribes.

The use of a rough draft is not necessarily involved. The first character of each line can be an indication related to the alphabet to be used in the line. Or the indication how to switch in between. Different alphabets can be just another  letter order or anything else.