Step's to Follow :
1. Right click on Taskbar and click on Properties.
2.Tick the following options given in the Image below :
(Note : If you are having a big monitor then tick the option " Use Small Icon " for a better appearance )
3. Tick the Option " Use Aero Peek ".
4. Finally you can even adjust the position of Icons present on Taskbar, just drag the icons so you can arrange them in a definite order. You can even re-size taskbar simply by dragging it.