P: Mouse click inaccuracy : Straighten tool & Eye dropper on High DPI monitors at 250% OS scaling

I tried that. Unfortunately, even with Windows scaling set to 200%, LR font size 250% gives me the same eye dropper problem. At this point, there seems to be no good solution. It's either inaccuracy of the eye dropper or a lot of squinting.

That process was quite interesting, if frustrating. Updating the GPU driver did not do anything. However, decreasing scaling did work. The eyedropper stayed as an eyedropper, not changing to an arrow. Also, the colors shown in the panel did then correspond to the position of the eyedropper. For that, the maximum scaling had to be 200%. However, my laptop recommended 250% scaling for a reason. With its recommended display resolution of 3840 x 2400, objects on the screen are very small with only 200% scaling. I am not sure how to work around this. Any ideas?

“update to the latest Nvidia driver” => 

“update to the latest Nvidia Studio driver”

Nvidia and Adobe recommend using Nvidia’s Studio drivers, not the Game Ready drivers, which don’t receive as much testing with creative apps like LR.

Another good question that I hadn’t even thought of.

Here you go:

Lightroom Classic version: 15.3 [ 202604090947-8f3672ed ]
License: Creative Cloud
Language setting: en
Operating system: Windows 11 - Home Premium Edition
Version: 11.0.26200
Application architecture: x64
System architecture: x64
Logical processor count: 24
Processor speed: 1.9GHz
SqLite Version: 3.36.0
Adobe GSDK Version: 1.4.0.213

CPU Utilisation: 2.0%
Power Source: Plugged In
Built-in memory: 31817.8 MB
Dedicated GPU memory used by Lightroom: 32.6MB / 7957.0MB (0%)
Real memory available to Lightroom: 31817.8 MB
Real memory used by Lightroom: 1338.7 MB (4.2%)
Virtual memory used by Lightroom: 1630.5 MB
GDI objects count: 619
USER objects count: 2479
Process handles count: 3027
Memory cache size: 1275.5MB
Internal Camera Raw version: 18.3 [ 2527 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 213MB / 15908MB (1%)
Camera Raw real memory: 231MB / 31817MB (0%)

Cache1: 
NT- RAM:0.0MB, VRAM:0.0MB, Combined:0.0MB

Cache2: 
m:1275.5MB, n:0.0MB

U-main: 82.0MB

System DPI setting: 240 DPI (high DPI mode)
Desktop composition enabled: Yes
Standard Preview Size: 3840 pixels
Displays: 1) 3840x2400
Input types: Multitouch: Yes, Integrated touch: Yes, Integrated pen: Yes, External touch: No, External pen: No, Keyboard: No

Graphics Processor Info: 
DirectX: NVIDIA GeForce RTX 4060 Laptop GPU (32.0.15.8129)
Init State: GPU for Export supported by default
User Preference: Auto
Enable HDR in Library: OFF
GPU for Preview Generation: Off (S5_7)

Application folder: C:\Program Files\Adobe\Adobe Lightroom Classic
Library Path: D:\Pictures\Lightroom catalogs\Adrians_catalog_2025.8.14\Adrians_LR_catalog_2025.8.14.lrcat
Settings Folder: C:\Users\agres\AppData\Roaming\Adobe\Lightroom

Installed Plugins: 
1) AdobeStock
2) ASUSDCP
3) Calibrite Camera Calibration
4) Flickr
5) jf Metadata Viewer
6) Luminar Neo
7) Pixieset

Config.lua flags: 

Adapter #1: Vendor : 10de
    Device : 28a0
    Subsystem : 37f81043
    Revision : a1
    Video Memory : 7957
Adapter #2: Vendor : 1002
    Device : 150e
    Subsystem : 37f81043
    Revision : c1
    Video Memory : 1db
Adapter #3: Vendor : 1414
    Device : 8c
    Subsystem : 0
    Revision : 0
    Video Memory : 0
AudioDeviceIOBlockSize: 1024
AudioDeviceName: System Default - Speakers (Realtek(R) Audio)
AudioDeviceNumberOfChannels: 2
AudioDeviceSampleRate: 48000
Build: LR5x34
Direct2DEnabled: false
GL_ACCUM_ALPHA_BITS: 16
GL_ACCUM_BLUE_BITS: 16
GL_ACCUM_GREEN_BITS: 16
GL_ACCUM_RED_BITS: 16
GL_ALPHA_BITS: 0
GL_BLUE_BITS: 8
GL_DEPTH_BITS: 24
GL_GREEN_BITS: 8
GL_MAX_3D_TEXTURE_SIZE: 16384
GL_MAX_TEXTURE_SIZE: 32768
GL_MAX_TEXTURE_UNITS: 4
GL_MAX_VIEWPORT_DIMS: 32768,32768
GL_RED_BITS: 8
GL_RENDERER: NVIDIA GeForce RTX 4060 Laptop GPU/PCIe/SSE2
GL_SHADING_LANGUAGE_VERSION: 4.60 NVIDIA
GL_STENCIL_BITS: 8
GL_VENDOR: NVIDIA Corporation
GL_VERSION: 4.6.0 NVIDIA 581.29
GPUDeviceEnabled: false
OGLEnabled: true
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Hu, that is interesting.

This is just a shot in the dark, but did you enlarge the pointer size, by any chance? I know there are some quirks with larger pointers on macOS but you're on Windows, so that might not be it. Worth taking a look at though?