On my MacBook Pro, the System Report says that the resolution is "2560 x 1600 Retina". But when I use the Free Ruler app, it says that 1280 x 800. That's with resolutions set to "Default for Display" in the system display settings.
When the display setting is "Scaled" and "More Space", Free Ruler measures it as 1680 x 1050.
Why is there suchI struggle to understand what I see as a discreptancy? What does and don’t understand "scaled resolution" even mean?.
How do I get the screen to operate at the resolution claimed.
To do my own research, I googled it. But got seemingly irrelvant articles about points per inch and human eyes. I asked ChatGPT. Its answer was more relevant but less understandable. I need human fingers to help me understand this, please.?