How does Mac set default startup Windows?

How does Mac set the default boot from Windows system? I believe many Mac users have installed OS X and Windows dual systems, although MAC systems are very useful, but sometimes some specific software needs Windows system to run, then how do we set the MAC boot default system? In fact, there are two methods, give you Mac users to do a simple introduction:

　First, boot Select the default boot system

1, press and hold "option" until the system selection interface appears to release;

2. Move the cursor to boot Camp and press "Ctrl";

3, press ENTER, this time into the Windows system, that is, the system is set to enter Windows by default. Set the default startup Mac OS X system to the same procedure, select Macintosh HD.

　Second, set the default boot system in OS X system

1. Find "Boot Disk" in "System Preferences"

2. Select "Boot Camp Windows" and click the "Restart" button to set the system to enter by default after startup.