I am typesetting my thesis and am enjoying the use of small caps for initialisms. They look great in the middle of a sentence, but I'm unsure what to do if they fall at the start of a sentence.
Currently I'm doing (1) and if I end up writing an initialism at the start of a sentence, I reword to avoid that. This sometimes ends up contorting the sentence a little, so I'd like to figure out my options if I want to leave it at the start.
(2) just looks wrong to me.
Is (3) common? It looks a bit like a normal word that has had small caps applied to it.
(4) seems inconsistent with the two different presentations in the one sentence.
(5) is me giving up on small caps altogether.
What should I do?