

Start the guest – we expect it to work properly this time.If you desire to use VirtualBox comfortably and with pleasure, surely one day you would need to resize the app picture to full-sized form mode.Start the guest – we don’t expect this to work.If it is Automatic, change it to “Hint” and add your preferred values.If it is not “Automatic” change it to “Automatic” and start the guest.File > Preferences > Display > Maximum Guest Screen Size should be “automatic”.

If none of the above steps fixes your problem the final act of desperation is to toggle the Maximum Display Size hint. You need to have “Auto-size Guest Display” and Full-screen Mode checked Set the VirtualBox Window setting correctly


To fix this permanently you will need to make several changes. The problem is that sometimes the VirtualBox guest does not detect the monitor properly and either it fills the screen but everything is so small I cannot see it (I assume it is picking up the ultrahigh resolution of the Surface Pro) or the whole guest screen appears as postcard in the middle of the monitor. I want to my Windows 10 virtual machine to run full screen on the 24″ monitor which is 1900 x 1200 pixels. I have a Microsoft Surface Pro 4 laptop and although it is a very high resolution screen it is only 12″ big so I do most of my development on a second 24″ monitor.
