I have been asked by a colleague about the appropriate shape of the PERISPOMENI. The tilde-like form seems to be most common usage, but in some typefaces (e.g.GFS Porson) an upwards bending bow appears instead. – Just a matter of taste? Of specific typographic tradition?
Any thoughts welcome.
The "upward bending bow" is an inverted breve.
http://www.tlg.uci.edu/~opoudjis/unicode/gkdiacritics.html
Take a look at the "Greek Circumflex" not too far down the page.
Taste and tradition be damned.
If your face has a large "kappa-height" and not much room for accents, use the inverted breve form, because the tilde form combined with psili or dasia makes for a horribly cramped composite accent.
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