left-click the box at the left-hand end of the 'Select'/'deselect' option's row
- this brings up the 'Morphic halo' or clickable buttons to do with sub-window management
left-click the window-close Morphic button - the X at the top-left of the window
The halo *should* appear if you meta-click (i.e. middle-click) the window - but it doesn't on my Windows install of the PBE-OneClick zip (which is id-ed as Pharo-1.0 Latest update: #10517 in System | About )
The BouncingAtomsMorph window - with and without the Morphic halo
