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You should disable the taskbar combining feature as described in the article: Note: Before proceeding, please keep in mind that this trick only works when taskbar combining is not set to the option Always combine, hide labels. Using a simple Registry tweak, you can enlarge your taskbar buttons and make them more suitable for touch screens or high-resolution displays. It is possible to change the minimum width of taskbar buttons. For example, you can add the good old Quick Launch toolbar to your taskbar. In Windows 10, the taskbar may contain the Start menu button, the search box or Cortana, the task view button, the system tray and various toolbars created by the user or third-party apps.
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