VirtualBox-Automatically adjusts screen size, display resolution

After installing Ubuntu in VirtualBox, Ubuntu's screen adjustment is not very good, the operation is very inconvenient, need to install VBox enhancements. Specific as follows:
1, in the device--"Install the enhanced function
This will automatically load the Vboxadditions virtual disc
2,/media/vboxadditions_4.0.10_72479 (4.0.10_72479 is the version number) found the corresponding operating system files, such as Linux, Vboxlinuxadditions.run
3, run this file, need Administrator privileges
4, Operation complete, restart Ubuntu
5, then, will,
Found menu item "Switch to seamless Mode" can be used
6. Click the "AutoFit Window Size" menu item, so the screen resolution will automatically adjust with the screen size, very convenient


Resources:
http://aofengblog.blog.163.com/blog/static/631702120101117104437593/

VirtualBox-Automatically adjusts screen size, display resolution