Clear Selection

Use the Select menu > Clear Selection command or Clear Selection button to clear the selection of all currently selected objects. It is an all or nothing command. You can not selectively clear a portion of a selection using this command. If you want to selectively clear a selection, left click on the selected objects one at a time or use the deselect tool. You can also use the  to clear the entire selection.

See also:

Select by Pointer/in Window