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(defvar vis nil)
(defun toggle-invis ()
(interactive)
(if vis (add-to-invisibility-spec 'myvis . t))
(remove-from-invisibility-spec '(myvis . t)))
(setq vis (not vis)))
(overlay-put (make-overlay (point-min) (point)) 'invisible 'myvis)(defvar vis nil)
(defun toggle-invis ()
(interactive)
(if vis (add-to-invisibility-spec '(myvis . t))
(remove-from-invisibility-spec '(myvis . t)))
(setq vis (not vis)))
(overlay-put (make-overlay (point-min) (point)) 'invisible 'myvis)
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