I tried many ways to make a bigger screen in VirtualBox because I do not like the small size of the guest window? Is there is a way to make it big?


13 Answers 13


View -> Switch to Fullscreen Mode (or HOST+F)

Right CTRL is normally the default HOST key.

You need to install the Guest Additions to be able to adjust the guest screen geometry to the host in fullscreen mode.

Here are different instructions to install Guest Additions.

  • 10
    For me this just makes the VirualBox instance fullscreen, not the cilent computer (there are grey borders on each side of the client OS's screen, which is as big as before HOST+F)
    – lindhe
    Nov 9, 2013 at 15:34
  • 2
    From within the virtual machine, try adjusting the resolution? ie: In Windows, go to Control Panel and set your resolution.
    – earthmeLon
    Nov 12, 2013 at 18:54
  • Does not help - it does not show the resolution of my physical screen as maximum, but some "preset" or virtually defined one. Maybe I should set a screen resolution in the VB settings for that machine?
    – lindhe
    Nov 12, 2013 at 21:22
  • 5
    Correct answer is to install Guest Additions: askubuntu.com/questions/184794/…
    – gspatel
    Apr 20, 2014 at 8:26
  • 1
    After installing "Guest Additions" I was able to make full screen
    – Raghav
    Feb 2, 2018 at 18:32

You need to install the Guest Additions go to devices menu > select "install guest additions" after installation restart virtual system now select view menu and click "switch to full screen"


I tried the solution provided by Mawhrin-Skel. However, it didn't work for me the first time. Then I installed virtualbox-dkms and virtualbox-guest-dkms and tried the solution again. This time it worked for me. Following are the steps that I followed

  1. Click Devices -> Insert Guest Additions CD image from the menu of the VM window
  2. Restart the VM


sudo apt-get install virtualbox-dkms
sudo apt-get install virtualbox-guest-dkms
sudo apt-get remove libcheese-gtk23
sudo apt-get install xserver-xorg-core
sudo apt-get install virtualbox-guest-x11

Hope this helps

  • This works for me
    – RJ45
    Nov 24, 2016 at 10:59
  • 3
    This broke my virtual machine... after 2 hours of installing. noooooo! Its going all spastic now, resizing, popping up and down.. then nothing! omg! :(
    – Piotr Kula
    Sep 26, 2017 at 14:56
  • This worked for me - might be helpful if you could say how it works.
    – Don Shanil
    Sep 13, 2018 at 12:54
  • 1
    This broke my virtual machine also ... use this solution with caution!!!
    – cyber_raj
    Jul 8, 2019 at 11:51

You need to enable "Scaled Mode" after installing Guest addons. Host+C

  • 2
    A bit more information would help. Jan 20, 2017 at 15:25
  • I found this helpful. It is the correct answer for console if you don't want to have a small box on the screen. For GUI the accepted answer works better.
    – Spikolynn
    Feb 5, 2017 at 20:41

Once you have installed Windows Operating system go to the resolution settings by >Right Click > Screen Resolution > change to (1920 x 1080)

If this does not work keep trying each resolution within the Settings. You should come across one which will fit your screen.

Don't forget to also (Auto Fit Guest) within the Virtual Machine View Settings.


This is not a problem with Guest Additions not installing. If copy-and-paste works between your host and your VM that means Gues Additions installed ok.

Turn off your VM. On VirtualBox VM console, select the virtual machine, go to Settings->Display and set your Graphics Controller to VMSVGA. This will fix the problem.

Another problem is the Linux desktop will be fine until you do a "yum update". Some package is being updated and once it does, the desktop icons will become huge. Have not figured out what's causing this.

More later.


None of the above methods worked for me, but the easiest method that eventually worked for me (a Mac user) was:

  1. In the top menu, select View
  2. Select Virtual Screen 1
  3. Pick one of the options till one of them works for you (for me, it's Scale to 150% and anything percentage bigger than that)

I hope this helps!


Devices --> Click on Insert Guest additions CD image option

If you have installed Ubuntu via Virtual Box on MacOS and experiencing an issue while trying to make the window size full screen, the solution is as follows.

Once Ubuntu has been installed, go to the the Virtual Box Menu Bar Devices -> Click on Insert Guest additions CD image option

Now, within Ubuntu you will be asked to provide sudo password and it builds the Virtual Box Guest Additions kernel module.

After restarting the VM , click on View -> Full Screen size and that should modify your display.

  1. Goto Settings

  2. Click Devices

  3. Then click DisplaysResolution and choose whatever resolution suits you. I had to try couple of resolutions to find out which one suits my display best(1680x1050).

  4. Then click Apply. You're done!

My monitor is 27" and you can see the outcome below.


You should run the following commands in a terminal on your host Ubuntu session:

sudo apt-get remove libcheese-gtk23
sudo apt-get install xserver-xorg-core
sudo apt-get install virtualbox-guest-x11
  • 2
    What do they do?
    – Mukus
    Aug 19, 2015 at 0:03

if using virtual box to use ubuntu on any other host.

  1. Start the virtual machine, when ubuntu is booting up switch of virtual machine immediately.
  2. Start the machine again, and when ubuntu prompts some boot up options, select the first one...
  3. Your Ubuntu will start with a bigger screen size in comparison to the older one.

The size of your screen in the virtualbox is actually the problem of the guest OS not of virtualbox itself. You'll want to change the aspect ratio in the guest OS. In Ubuntu this can be done by clicking the downward facing arrow in the top right corner of the screen, this will open a small window in that area, click on the settings button, then go down to devices, and then display, and select a display size. The correct choice will depend on your monitor, but I selected "1440X900(16:10)" and that got rid of the gray borders on my computer.


In the beginning my mouse did not fit in the virtual OS, now the mouse is working in the full screen mode. What I did is

  1. install those packages as mentioned above
sudo apt-get install virtualbox-dkms
sudo apt-get install virtualbox-guest-dkms
sudo apt-get remove libcheese-gtk23
sudo apt-get install xserver-xorg-core
sudo apt-get install virtualbox-guest-x11
  1. shut down
  2. before start again, go to Setting --> Display, and increase Video Memory, mine is 72 MB and working fine.
  3. Start the OS.
  4. Host + F and Host + C Done.

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