Deselect Last command (Edit menu)

Use this command to select the last selection of the active document for copy to clipboard or conversion operations.

Keys: CTRL + SHIFT + L (,), COMMAND + SHIFT + L ()

If this is currently shown page (3 selections made on it – bottom one is the last):

After "Deselect Last" command is executed, last selection is cleared, while all the other selections on the document are unaffected.