fullscreen for virtualbox in ubunu

[ameba]

plz help

i need to have a fullscreen for testing another os with virtualbox
with crl+f the screen is 50% black

how to do that?

thanks in advance for your help

[Perryg]

Well installing the guest additions would be a start.

[ameba]

thanks for you answer

i am new user

can you tell me how to install ?

i see the vboxguestadditition.iso to ....file---virtual media manager - cd/dvd manager

when i tray to setup i have a error message
Result Code:
VBOX_E_INVALID_OBJECT_STATE (0x80BB0007)
Component:
VirtualBox
Interface:
IVirtualBox {3f4ab53a-199b-4526-a91a-93ff62e456b8}


may i haVE YOUR help?

thanks in advance

[Perryg]

If you start the guest and click on devices (top left of the Guest window) you will see install guest additions. Click on that to install them. If nothing happens then click devices and unmount CD/DVD and then click on install guest additions. Once they are installed you need to reboot. After that you will have better screen resolution and be able to click drag to any size you want.

You can read more about this by clicking on the VirtualBox program and then help / content. The users guide will explain this all to you.