This option allows you to select all objects except for those currently selected. Say, for example, that you have 20 objects and wish to select all but two of them. You can do this by (1) selecting the two objects to be excluded and then (2) using the Select->Invert menu (or Ctrl+I). This will deselect the two currently-selected objects and select the 18 unselected objects.
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Another way to do this is to Select->All (or Ctrl+A) and then use Shift+Click to deselect the objects you don't need. |