Set Zoom to 100% ?

 From:  Michael Gibson
3913.2 In reply to 3913.1 
Hi NightCabbage, no there's not any way I can think of to do that currently.

In a perspective 3D viewport, there isn't even a constant relationship of pixels to units due to perspective foreshortening. Things that are far away may have a large number of units fit within the same screen pixel size of something that is a smaller unit size but closer to the eye point.

- Michael