Adjustment Brush Tool will not switch to negative contrast.

Report · Jul 16, 2024

The button does nothing. I tried on multiple images, restarted the program and my computer. Verified the app and my drivers are up to date.

Version of the app. v25.12
Platform and OS version. PC app, Windows 11
Basic steps to reproduce the problem. It simply doesn't work on any image.
Expected result and actual result Expected it to do something. It did nothing.

Report · Jul 17, 2024

Hi @Xen0189nial testing here with Adobe Photoshop Version: 25.12.0 20240714.m.2698 578bfe6 arm64 and it seems to be working as expected.

Try resetting Prefs for the Beta:
/Users/yourname/Library/Preferences/ Photoshop Beta Settings (Mac Ventura)
/Users/yourname/Library/Preferences/Adobe\ Photoshop\ \(Beta\)\ Settings (Mac) 

C:\Users\user name\AppData\Roaming\Adobe\Adobe Photoshop (Beta)\Adobe Photoshop (Beta) Settings

Launch BETA Photoshop While Pressing The Keyboard Shortcut
With Photoshop closed, press and hold Shift+Ctrl+Alt (Win) / Shift+Command+Option (Mac) on your keyboard and then Launch Photoshop the way you normally would.
https://helpx.adobe.com/photoshop/using/preferences.html#Manually 

Thanks,

Cory - Photoshop Product Manager

Report · Jul 17, 2024

The "-" button is not meant to give you negative contrast. Use the "+" button in order to tell PS, where the adjustment is applied in your image. You are actually painting in the mask. Then use the "-" button in order to subtract something from those areas, which you brushed with the "+" brush. Just look at the mask in the layers panel.