With Photina designed to be a good pairing with Univers sharing a similar x-height, is there a proper way to use these two in the digital domain? What I’m running into is 18pt Photina is not 18pt Univers. Is there a proper convention of offsetting these sizes so that they line up properly?

As far as I know there’s only one digital version of each, Monotype and Linotype respectfully, so pairing specific digitizations of these typefaces seems out of the question.

Any advice on this matter is greatly appreciated. Photina italic shreds.