When you select the Start menu in Microsoft Windows 8, only the most recently used applications will be displayed. You can permanantly pin an applications icon tile to the Start menu though if you like. Just follow these steps.
1. Mouse over the lower-left corner of the Desktop to bring up the Start menu. Select it when it appears.
2. Right-click or tap and hold a blank area, then select the All apps option in the lower-right corner.
3. Right-click or tap and hold the application icon tile that you wish to add, then select Pin to Start.
Alternately, you could just start typing the name of the application from the Start screen, then right-click and select Pin to Start.
The app is now pinned for easy access to your Start menu.