I was thinking of how when the Lopen spoke his second ideal and the glyph appeared in frost on the ground.
The Lopen was outraged because he had wanted that to happen at a dramatic moment. And the Stormfather laughed at him.

So, like I said, I was thinking. I went back and searched WoR and, sure enough, a glyph appeared when Kaladin said the words (but only after Syl returned).

A glyph also appeared when Kaladin landed after saving Dalinar there was also a glyph. It wasn't frost, but stormlight smoke/mist.

Is that going to be normal? Or was that Syl or the Stormfather's doing?
Does the Stormfather have a sense of the dramatic?

I was also thinking about other aspects of glyphs... IIRC, it's only since the "Last" Desolation that Vorinism became a real thing, and male illiteracy along with it.
I had thought that the glyphs were created in answer to that.
The above occurrences of glyphs makes me wonder:
Do glyphs predate Vorinism?

Or does the Stormfather simply have enough general knowledge to both read/write glyphs and to know that doing so will work in favour of his flair for the dramatic?
Most recently bonded spren aren't quite so savvy in the physical realm.