By default, only a few apps appear on the taskbar as icons, but you can add an app to the taskbar. This means you can quickly launch your favourite programs when working in Windows 8 Desktop.
Step 1 Right-click anywhere on the Start screen and from the toolbar that appears at the bottom of the screen, click All apps.
Step 2 From the list of apps, right click the app you want to pin to the taskbar.
Step 3 From the toolbar that appears at the bottom of the screen, click Pin to taskbar.
Step 4 The app icon will appear on the taskbar.
Certain apps can’t be pinned to the taskbar. Apps, such as Calendar and Messaging that are designed to run from the Start screen, can only be pinned to the Start screen itself.
You can rearrange the order of the icons on the taskbar by simply clicking on an icon and dragging it to a new position.