Sometimes when you first power on your Ubuntu Virtual machine (or any similar VM), the window size and resolution are quite small.
Here is a short tip on how to increase the size of the window.
Read: How to Change the Resolution of Ubuntu 22.04 VM in VirtualBox
First in you virtual machine, click on Settings after you have selected the Ubuntu VM :
This will open up the window below (make sure you click on the Display icon on the top):
Now as shown above, modify the value of the scale factor. Once done, click OK.
Now start you Ubuntu VM :
You will notice that the screen size has changed.
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