Dear Eowin,

Your solution is great and works! only using mere Justify will not do and you will need to press Shift+Enter in the end of both mesra's in all beyts (lines).

Please note that you used the words mesra’ and beyt the wrong way: a beyt consists of two mesra’s. Nearly all types of Persian poems consist of beyts, each consisting of two mesra’s, and the most common – and reasonable – way of writing/typing them is to put two mesra’s in the same line, facing each other. The reason is that either the last words in two mesra’s in the same beyt (line) rhyme, or the last words in all the beyts (end of all second mesra's) rhyme. Another reason is that the second mesra' in each beyt (line) is often a continuation of the first mesra' and is only separated because of the rules of poetry.

Also please note that "Layout>Breaks>Column" is different from "Layout/Columns"; it is the former which serves my purpose, which you proposed. The subtle point is that using the former, you are able to go on typing the opposite mesra' in the same line right away, but using the latter you would have to complete a single column before you went to the opposite column in the same page.

What is more, as Persian (Farsi) is a right-to-left language, the right-to-left box has to be ticked under the Column option in both cases.

Using an invisible table could be a useful solution for short poems, but not for a very long one like Shāhnāmeh, taking hundreds of pages, as it adds considerbly to the file size. Putting a single table in each page would again not work, because there is a chance in case of certain poems that the poem will be modified, adding to or reducing the length of the poem and resulting in an inconsistent format. Using tables, other problems might arise too depending on every person's experience.

I again appreciate the help and contribution of everybody on this post.