Above all things, you have to know what port forwarding/port mapping is. Port forwarding refers to the mechanism of packets forwarding. Its essence is firewall's configuration strategy. But its function mainly focuses on packets forwarding, in order to achieve the purpose of operating specific packages (IP address parsing and filtering based on destination port number). As a consequence, it is generally taken out as an independent concept.
If you are using dual or more displays, you are likely to encounter the following challenges:
How to set different wallpapers or screen savers for two or multiple monitors
How to make the same wallpaper display in a perfect way on monitors with different resolutions
How to make sure each display has its own customized window, taskbar, etc.
It isn't unusual to automatically change the desktop wallpaper using software (even it has built in this function since Windows 7). However, one characteristic of John's Background Switcher (JBS for short) is that it combines the montage style of photo wall effects with wallpaper's layout. This undoubtedly makes the desktop wallpaper get the greatest degree of personalization, which is also the function many users have been looking for!
DNS Helper (successor of Google DNS Helper) is another simple DNS fast switching utility for a faster, safer and more reliable Internet experience purpose. It's designed to quickly switch over to the popular global free DNS servers (or your own custom DNS servers) with backup/restore feature.
For home users, accessing any website has to pass through a local ISP's default DNS servers, which decide whether we can access some websites or not, as well as their access speed and security. Althrough we can change the DNS, problem is, the method used to manually modify is too complicated and troublesome for ordinary users, so we'd better use tools instead.
Using shortcuts (Alt + Tab) to switch among multiple programs is very convenient, but we can't find any option about it in the system. Actually that's because it is hidden by Microsoft, yet we can easily customize the settings through 3rd party program Alt Tab Tuner VIII (successor of Alt+Tab Tuner).