Created attachment 182636 [details] Panel expanding instantly in a single step when opening a new window. Smooth panel resizing animation when content size changes Currently, when widgets are added to or removed from a Plasma panel, or when the content dynamically grows (for example: new icons, systray elements, or task buttons), the panel resizes instantly in a single step. It would greatly improve the visual polish of KDE Plasma if the panel resizing was animated smoothly: gradually expanding or contracting its size to fit the content with a configurable animation duration. This would align with the modern animated UI transitions found in other parts of Plasma (like widget expand/collapse, tooltips, notifications, and KWin window animations). When the panel needs to grow/shrink due to content changes, it should smoothly animate to the new size instead of jumping instantly. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Fedora 42 KDE Plasma Version: 6.4.0 KDE Frameworks Version: 6.15.0 Qt Version: 6.9.1