Right-click on the vm object to configure the VM filesystem that will be created by dragging the object onto the canvas. You can also configure the name that Cloonix will create for the VM, the amount of RAM available to the VM, the type of VM, and the number of Ethernet interfaces configured on the VM.
In the case, downloaded the kvm_squeeze_qcow2 filesystem from the Cloonix Downloads page, so you configured the vm object to use this filesystem.
used the mouse (and the left-click button) to drag-and-drop the vm object three times onto the canvas. Each VM appears on the canvas as a red circle that eventually turns blue when it finishes booting. waite until each VM was fully started (that is, it turned blue) before creating the next VM.