Many software programs and systems allow users to specify font size using pixel height, such as Photoshop and CSS.
But what does this measurement actually refer to? Is it the distance from the descender to the ascender? Or perhaps from the baseline to the cap height? I'm unsure if there is a universal standard for this, or if each application interprets it differently.
// UPDATE
I've come to realize that this might not be the appropriate place to inquire about this. Is there a way to delete or retract this question?