Cloning of Virtual Machines
This document is used to collect information about cloning of virtual machines in Gnome Boxes and other (and similar) software.
Virtualbox shows all available virtual machines in a list and the user can select a "Clone" menu item by right clicking one of the VMs.
Virt-Manager features the same list-based VM display and a popup menu with a "Clone" item.
A step-by-step manual on how to create a VM clone can be found on VMware's support page.