I’ll introduce how to configure screen size changes for Windows 7 installed on VirtualBox.

Installing Guest Additions enables screen size changes.

• Using VirtualBox on Large Screen (Guest Additions)
• How to Use Free Virtualization Software "VirtualBox" for Simultaneous Mac and Windows Use / Inforati

Installing Guest Additions requires VBoxGuestAdditions.iso.

On Mac, this file path is inside the application package, so first copy it to the desktop, then load it via:

“Devices” → “CD/DVD Devices” → “Choose Virtual CD/DVD Disk File”

VBoxGuestAdditions.iso File Location

[Mac]
/Applications/VirtualBox.app/Contents/MacOS/VBoxGuestAdditions.iso

[Windows7]
C:\\Program Files\\Oracle\\VirtualBox\\VBoxGuestAdditions.iso

On Windows 7, you can install via menu bar “Devices” → “Install Guest Additions”.

That’s all from the Gemba.