In typography, rivers, or rivers of white, are gaps in typesetting, which appear to run through a paragraph of text, due to a coincidental alignment of spaces.
River (typography), Wikipedia.
I was looking for examples of poetry that took advantage of this kind of phenomenon in typography. But in general, one could argue that any poem with unusual text alignment or disposition plays with typography, so to narrow it down I'd specify that the text:
- every line must be aligned left or justified,
- must preserve its layout in (or be designed specifically for)
Is there a general category for this kind of work? I'm struggling to find a single example of such text, so it would help me to narrow down my search.