I am told that because the way we have evolved and socially wired our brains optimal proof-reading requires printing out our writing on paper, since we are historically used to this method. I suspect this is silly and doesn’t really have a strong basis, but rather it is the “finality” we feel when seeing our works in front of us that causes us to proof-read better.
One feels a certain pride, like the difference between a framed drawing vs an unframed drawing, and this emotional connection causes us to use a fresh section of the brain for analysis.
This would make far more sense to me.
Nonetheless I’ll likely never subscribe to the “You must print your work out to properly proof read” yet I would like to apologize to the readers for any poor grammar, sentence structure, and related “quality”.