SUMMARY Pressing SHIFT + mouse wheel, should perform horizontal scrolling. STEPS TO REPRODUCE 1. Open dolphin in a directory so that both hotizontal and vertial scrollbar are visible 2. Press SHIFT while scrolling mouse wheel OBSERVED RESULT Vertical scrolling EXPECTED RESULT Horizontal scrolling Operating System: openSUSE Tumbleweed 20231120 KDE Plasma Version: 5.27.9 KDE Frameworks Version: 5.112.0 Qt Version: 5.15.11 Kernel Version: 6.6.1-1-default (64-bit) Graphics Platform: X11 Processors: 24 × AMD Ryzen 9 5900X 12-Core Processor Memory: 62.7 GiB of RAM Graphics Processor: NVIDIA GeForce RTX 3080/PCIe/SSE2 Manufacturer: Micro-Star International Co., Ltd. Product Name: MS-7A38 System Version: 8.0
Upon further investigation it seems this behaviour is mapped to ALT + mouse wheel, this is wrong and doesn't follow convention of what every other application is doing, using SHIFT + mouse wheel
*** This bug has been marked as a duplicate of bug 475773 ***