When you click 'Add machine' a new machine icon appears.

 

And just like Microsoft Windows, you can RightClick the new icon to get a menu of options related to this new machine.
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In this case of course the first thing to do is to give the machine a more sensible name. You rename the machine just like renaming any other Windows file or folder.

Look now at two other options on the menu. ‘Properties’ and ‘PortScan’.

 
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