I have been using Lightroom on a 30" 2560x1600 monitor for the past 12 years. It was time to replace my monitor, so after doing some research, I got a 43" 4K monitor. (I have a desk deep enough to push the monitor back so it’s comfortable). The ppi on the 43” is about the same as the 30” at around 100ppi.
The Windows 10 display scaling is set to custom scaling at 115% and the Ease of Access Display settings are set at default. This gives me a good size of interface and crisp fonts on nearly all apps.
Photoshop scaling is fine. In Preferences, Interface, the UI Font size is set to medium with ‘Scale UI to Font’ disabled. I can fit a lot onscreen at a sensible size, with sharp fonts.
I’m having issues with Lightroom however. Whatever I do, the interface size is either too large or small. In the screenshots below you can see Preferences, Interface, Font Size set to Auto, Medium and Large – 150%.
The best size is Medium, but it is rather small and tricky to work with, as clicks on the Develop panel need to be very precise. As you can see from the comparison, the Large – 150% interface size is just too large. I can’t fit enough panels onscreen and loose too much space. I’ve also tried adjusting the program size in Properties, Compatibility, Change high DPI settings in the ‘High DPI scaling override’ sections, but that doesn’t make any difference.
Would it be possible for Adobe to give us more front size options? At the very least, one extra option which would be Large - 125%, which is a standard Windows Display option. That would allow the interface to adjusted more precisely and give better results, regardless of monitor size.
This is a user supported forum. While Adobe employees occasionally monitor and comment here, it is not a forum that is seriously monitored by the development team. The link given is much more closely monitored for that purpose.