We have to check the View option, as you can see in the attached screenshot: The menu bar consists of the following options: File, Machine, View, Input, Devices, and Help. Once you are logged in from any user, you have to check the menu bar displayed on the top of the virtual machine. To change windowed mode to full-screen mode in Ubuntu 20.04 Linux system on the Oracle Virtual Box, you have to start the virtual machine. Method to Change Windowed Mode to Full-screen Mode in Ubuntu 20.04 Linux System on Oracle Virtual Box Follow this guide to switch from windowed mode to full-screen mode and full-screen mode to windowed mode, as well. We can change it into full-screen mode as well. While the guest OS is operating, Oracle VM Virtual Box generates a separate environment for it.

By default, Ubuntu 20.04 Linux system on the Oracle Virtual Box opens up with the windowed mode.

The Virtual Box comes with a lot of features. In this guide, we have installed Ubuntu 20.04 Linux system on the Oracle Virtual Box. Virtual machines enable legacy applications to run on new software, lowering the cost of migration. Virtual machines (VMs) can run numerous operating systems on a single physical computer, storage capacity, time, and financing costs. Virtual Box can run on Windows, Linux, or macOS as its host operating system. The “ host” is the operating system on which Virtual Box runs. Virtual Box is free software that allows you to virtualize the x86 computer architecture.

Macos virtualbox menu bar