Comment by 8n4vidtmkvmk
4 hours ago
Why does the PPI matter at all? Thought we only cared about the scaling factor. So 2 in this 100 to 200 scenario. It's not like I'm trying to display a true to life gummy bear on my monitor, we just want sharp images.
These days, as most take 1x scaling factor for 96 PPI (or 72 if you're Apple), yes, but at the very beginning, there was no such reference. 100x100 without the density could have meant 10x10 or 100x100 inches.
Some software, most notably image editors and word processors, still try to match the zoom of 100% with the physical size of a printout.