A virtual machine's task list is a visual representation of all actions carried out on the machine. An example of a task is any power related actions.
The following is logged with every task:
Tasks lists are available on individual virtual machines, as follows:
The most recent tasks will be displayed at the bottom of the virtual machine overview screen. To view older task select Tools -> Tasks from the menu beneath the machine's hostname.
Note, the main task list is related to the virtual machine only. Individual resources within the virtual machine, i.e. a disk, have their own task list within their individual overview pages for mount/detach and backup restoration progress etc.