How to set the number of toggle Windows displayed in Win7 computer?

How to set the number of toggle Windows displayed in Win7 computer? Below, let small make up to tell you, how should operate it!

1. First, we need to use Win+r shortcut combination to open the Run window, in the Open Run window, we enter regedit and click Enter, so that you can open the computer's Registry Editor window.

2. In the Open Registry Editor window, we click to expand HKEY_CURRENT_USER Control Panel in the left-hand menu, and then we move the mouse to the right window and we can find the name " Coolswitchcolumns "option.

3. We double hit open coolswitchcolumns option, and then in the pop-up window, we will delete the default value data, and then reset to the desired number of switching window can be.