machine's actual hard drive.
@item After installation is complete, restart the virtual
-machine. (If you are using @strong{VirtualBox}, you may wish
-to install the @qq{Guest Additions,} which will allow you to
-use the virtual machine in full screen.)
-
-@item Open a @strong{terminal}.
+machine. If you are using @strong{VirtualBox}, you may wish
+to install the @qq{Guest Additions}, which while not essential for
+compiling @code{Lilypond} will allow you to use the virtual machine
+in full screen, Seamless mode (also known as Unity mode on other
+virtualization platforms) and allow you to share clipboards between
+the physical and virtual machine. From the @code{Devices} menu select
+@code{Install Guest Additions...}, the @code{VBOXADDITIONS} CDROM device
+will appear on the desktop. Open a @strong{terminal} session.
+(@code{Applications > Accessories > Terminal}) and @code{cd} to the
+top level of the CDROM. Run the @code{autorun.sh} script as superuser
+(@code{sudo ./autorun.sh }), a console window will open while the
+@qq{Guest Additions} are being installed. Once the script has
+been finished, reboot your Virtual Machine to complete the installation
+of the @qq{Guest Additions}.
+
+@item Open a @strong{terminal} session.
(@code{Applications > Accessories > Terminal})
@c FIXME: make sure the url link below doesn't get broken -vv