You can quickly switch between programs by using taskbar buttons. Taskbar buttons represent open folders or programs and are located on the taskbar.
Click the taskbar button that corresponds to the program you want to switch to.
If you can't see the taskbar, you might have auto-hide turned on. To display the taskbar, point to where you last saw it to show it again. If you can't remember where you last saw it, try pointing to the bottom of the screen first, and then to the side or top of the screen, if necessary.
You can also switch to the previous open program or document by pressing ALT+TAB, or you can cycle through open windows by holding down ALT and repeatedly pressing TAB.