Translations:Plasma/Tasks/10/en

From KDE UserBase Wiki

If you have many windows opened the tabs may be grouped. In that case, you will see a number with a small arrow above in the right-hand side of the tab. Clicking on such a tab will bring up a list of tabs for individual windows that you can use just like ordinary Task Manager tabs. Right-clicking a group gives you the option to close all windows in that group.