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

In general, I think that a well-functioning support should definitely respond to a user, even if they don't think the problem is theirs.

By @Péter Kollányi

Remember, or be aware, that this community site is not the Adobe Support site. The community pages are for customers to communicate with other users. Sometimes actual Adobe employees may interact in the community pages, but not often.

Now, that being said. In this now merged discussion, I see that one Adobe employee has responded.

Oh, and moved back inot Bugs.

Iam  assuming you are scaling on that big 4K as to be able to see better, things can get small. I cannot assume you are internally changing the LrC Font size to 250% (but the default of automatic might accomplish that anyhow).

As you have Windows OS, not MACOS, you can consider changing the display resolution to smaller than the default (I assume again) 3840x2400 and then scaling up. That is go for a smaller resolution and no scaling up (perhaps limit that to the default 150%) That could eliminate the LrC Font upscaling to 250% and the problem might go away or at lest not be so prevalent.

And/or, you might consider in LrC to not accept the prefences default of Automatic, and select smaller than 200%.

This is a workaround, not a solution.

with a 250% monitor setting

Ahh, that got me rethinking.

First up, 250% is not my normal setting, and I assume you meant the display settings (Scale) via Windows. What I am refering to in Windows OS is /Setings/System/Display/Scale/.  So I tested that out, but nope, not an issue on my laptop.

But that beings up a different idea (somehow) on what to search for, and I tried "mouse Accuracy". And that sends me to the following:

https://community.adobe.com/t5/lightroom-classic-discussions/straighten-tool-loses-accuracy/m-p/14033794

So, I went into Preferences > Interface > Font Size and set that to to 250%, and dang if the straighten tool shows this issue (My WB Picker did not)

Note that after each change to Windows or to LrC I restarted Lrc. (Or so I thought)

When you stated 250% monitor setting was that a Windows Display setting, or the LrC Fonts setting?

At any rate, does the above link sound like your issue?

BIG HUGE FOLLOWUP (yep I am shouting for emphasis)

After the above testing, with Windows scaling back up at 250%, I relaunched LrC again, And dang it if the Font size was not 250% (preferences set to automatic) and your issue popped up for the straighten tool (but not WB). Setting the LrC Font to Large, then restarting LrC corrected that issue.

Now, if I reset my Windows display scaling back at 150% (recommend) and LrC Font setting at 250%, The problem comes back. So looks like the issue is in LrC, in Preferences, in Font setting.

Your issue might be a bug (yep the word bug) in the LrC Font setting .

Hi,

this problem has already been reported by several people in several posts (including myself), but almost a year has passed since my last report and nothing has happened, and several posts have been closed by saying that the error has been fixed, which is not true, at least not with my configuration. This problem renders several important functions of Lightroom Classic unusable (e.g. straightening, using the eye dropper in various functions). I think high DPI monitors (even 4K monitors) are quite common today and many photographers use them. I have an ASUS ProArt Studio laptop with a 16" 4K monitor, with 250% windows setting. I am using the latest Adobe Lightroom Classic, v.12.4. Again, please reopen the error investigation and report back, that they are dealing with this problem, because I can't use the program like this and I have already invested too much in the hardware I use, so I will look for other software if all the ropes are broken. Here are a couple of previous announcements:

https://www.reddit.com/r/Lightroom/comments/4wlf4i/lightroom_dropper_bug_on_surface_pro/

https://community.adobe.com/t5/lightroom-classic-bugs/p-white-balance-dropper-target-location-is-offset-on-high-dpi-windows-devices/idc-p/13395503/page/3

https://community.adobe.com/t5/lightroom-classic-discussions/mouse-click-inaccuracy-in-the-straighten-tool-and-eye-dropper-on-high-dpi-monitors/m-p/13032243

https://community.adobe.com/t5/lightroom-classic-bugs/p-white-balance-dropper-target-location-is-offset-on-high-dpi-windows-devices/idc-p/12260965/page/2#M3906

Regards,

Péter

On a HightDPI laptop, the straighten tool and the eye dropper do not click where the mouse points. This is a big enough problem because it makes these tools unusable. Unfortunately, this seems to be a problem of more than six years and still has not been fixed (https://community.adobe.com/t5/lightroom-classic-bugs/p-white-balance-dropper-target-location-is -offset-on-high-dpi-windows-devices / idi-p / 12250363). Could I get information on how this fix stands, especially since Photoshop doesn't have this problem, for example? I have an ASUS ProArt Studio laptop with a 16" 4K monitor with a 250% monitor setting. "johnrellis" says this bug is already fixed, but I can confirm that it is not. I'm writing again because, despite the fact that I attached a video demonstrating the error to the original post, the post was closed as resolved. So, once again, my last post there: "Unfortunately, the error has not completely disappeared everywhere. I have an ASUS ProArt StudioBook. It runs Windows 11 Pro. The screen is 16" and has a resolution of 3840x2400 with the recommended setting of 250%. Adobe Lightroom Classis is the latest version, version number 11.4.1, Camera Raw version number is 14.4.1. These can also be seen in the attached video . In the video, I demonstrated that when I use the straighten tool, the starting point of the ruler appears above and to the left of the mouse click. By the way, the mouse works well everywhere in Windows and in most places in Lightroom." The video demonstrating the error: Error1.mov

Adobe marked that bug report as fixed in version 9.3 (June 2020):

https://community.adobe.com/t5/lightroom-classic-bugs/p-white-balance-dropper-target-location-is-offset-on-high-dpi-windows-devices/idc-p/12260965#M3906

Two users confirmed that it was fixed for them, and no one followed up that it wasn't fixed for them.

Given that, I recommend you post a new bug report in the Bugs section, providing all the requested information as described here:

https://community.adobe.com/t5/lightroom-classic-bugs/how-do-i-write-a-bug-report/idi-p/12386373 

Full-resolution, full-window screenshots and screen recordings can be very helpful too.  (For screen recordings, you need to upload them to Dropbox, Google Drive, or similar and include the sharing link.)