Synopsis:
   unclear [-all|-hidden|-visible]

Description:
   This command repositions the bottom of the scrollback buffer, effectively
   undoing the clear(4) command.

Options:
   -all      clears all windows, not just the current one
   -hidden   clears all hidden windows
   -visible  clears all visible windows

See Also:
   clear(4); bind(4) clear_screen; set(4) hold_mode;
   window(4) hold_mode