Re: Mixed L2R and R2L paragraphs and horizontal scroll

    > What you describe here is the Emacs screen as rectangle frame moving
    > over the visual ordered text.

    For truncation and continuation, yes.  For horizontal scrolling, no:
    it works in the logical order.  That is, scroll-left moves text in
    each line towards its respective margin: left margin for L2R lines,
    right margin for R2L.  More about this near the end of this message.

Please don't do that.  It is counterintuitive, and contradicts the
idea of scrolling left and right.  When we have a horizontal scroll
bar, that behavior will make no sense at all.