undelete <item number>, ...
The undelete command is part of the multiplot environment; it can be used to reverse the effect of deleting a multiplot item with the delete command. The desired item to be undeleted should be identified using the reference number which it was given when it was created; it would have been displayed on the terminal at that time. For example:
undelete 1
will cause the previously deleted item numbered 1 to reappear.