Desktop size problem with VirtualBox.

[kyme]

Hello,

After installing Ubuntu 8.10 using Vitual Box. After loading
up, it displays a small screen size of my desktop running with Ubuntu.

How do i fix this? Seems I don't have that much knowledge troubleshooting
ubuntu.

*I tried to set in the settings in Virtual Box but theirs no settings
about screen size.

What shall i do? Please help me..:(

[kpkeerthi]

Install guest additions. Start the guest OS and then choose "Install Guest Additions" form VirtualBox Device menu.

See http://download.virtualbox.org/virtualbox/2.2.0/UserManual.pdf