TuneUp SystemControl
Behavior > Taskbar > Button Appearance

Button Appearance

Here, you can specify whether and how windows should be represented by buttons on the taskbar.

If you want a button to be added to the taskbar for each open window, you must leave the option Show windows as taskbar buttons selected.

Appearance: specify the Maximum width of the buttons in pixels here. The default setting is 154. The option Show animated buttons can be enabled or disabled.

Under Grouping, you can specify that multiple windows for the same application should be combined into a single button on the taskbar. If you want to enable this function, select Group similar taskbar buttons. You can also select Group any application with at least X windows. By default, grouping is applied as soon as an application has two buttons on the taskbar.