diff --git a/man/panel.3x b/man/panel.3x
index cc36d22..c63b431 100644
--- a/man/panel.3x
+++ b/man/panel.3x
@@ -1,5 +1,6 @@
 .\"***************************************************************************
-.\" Copyright (c) 1998-2020,2015 Free Software Foundation, Inc.              *
+.\" Copyright 2018-2023,2024 Thomas E. Dickey                                *
+.\" Copyright 1998-2016,2017 Free Software Foundation, Inc.                  *
 .\"                                                                          *
 .\" Permission is hereby granted, free of charge, to any person obtaining a  *
 .\" copy of this software and associated documentation files (the            *
@@ -26,168 +27,264 @@
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"
-.\" $Id: panel.3x,v 1.18 2015/04/11 10:23:49 tom Exp $
-.TH panel 3X ""
-.ds n 5
-.ds d @TERMINFO@
+.\" $Id: panel.3x,v 1.63 2024/03/16 15:35:01 tom Exp $
+.TH panel 3X 2024-03-16 "ncurses @NCURSES_MAJOR@.@NCURSES_MINOR@" "Library calls"
+.ie \n(.g \{\
+.ds `` \(lq
+.ds '' \(rq
+.\}
+.el \{\
+.ie t .ds `` ``
+.el   .ds `` ""
+.ie t .ds '' ''
+.el   .ds '' ""
+.\}
+.
+.de bP
+.ie n  .IP \(bu 4
+.el    .IP \(bu 2
+..
 .SH NAME
-panel \- panel stack extension for curses
+panel \-
+panel stack extension for \fIcurses\fP
 .SH SYNOPSIS
-\fB#include <panel.h>\fR
-.P
-\fBcc [flags] sourcefiles \-lpanel \-lncurses\fR
-.P
-\fBPANEL *new_panel(WINDOW *win)\fR
-.br
-\fBint bottom_panel(PANEL *pan)\fR
-.br
-\fBint top_panel(PANEL *pan)\fR
-.br
-\fBint show_panel(PANEL *pan)\fR
-.br
-\fBvoid update_panels();\fR
-.br
-\fBint hide_panel(PANEL *pan)\fR
-.br
-\fBWINDOW *panel_window(const PANEL *pan)\fR
-.br
-\fBint replace_panel(PANEL *pan, WINDOW *window)\fR
-.br
-\fBint move_panel(PANEL *pan, int starty, int startx)\fR
-.br
-\fBint panel_hidden(const PANEL *pan)\fR
-.br
-\fBPANEL *panel_above(const PANEL *pan)\fR
-.br
-\fBPANEL *panel_below(const PANEL *pan)\fR
-.br
-\fBint set_panel_userptr(PANEL *pan, const void *ptr)\fR
-.br
-\fBconst void *panel_userptr(const PANEL *pan)\fR
-.br
-\fBint del_panel(PANEL *pan)\fR
-.br
-.SH DESCRIPTION
-Panels are \fBcurses\fR(3X) windows with the added feature of
-depth.  Panel functions allow the use of stacked windows and ensure
-the proper portions of each window and the curses \fBstdscr\fR window are
-hidden or displayed when panels are added, moved, modified or removed.
-The set of currently visible panels is the stack of panels.  The
-\fBstdscr\fR window is beneath all panels, and is not considered part
-of the stack.
-.P
-A window is associated with every panel. The panel routines enable
-you to create, move, hide, and show panels, as well as position a
-panel at any desired location in the stack.
-.P
-Panel routines are a functional layer added to \fBcurses\fR(3X), make only
-high-level curses calls, and work anywhere terminfo curses does.
-.SH FUNCTIONS
-.TP
-.B new_panel(win)
-allocates  a  \fBPANEL\fR structure, associates it with
-\fBwin\fR, places the panel on the top of the stack  (causes  it
-to  be  displayed above any other panel) and returns a
-pointer to the new panel.
-.TP
-.B update_panels()
-refreshes the virtual screen to reflect the relations between the
-panels in the stack, but does not call doupdate() to refresh the
-physical screen.
-Use this function and not \fBwrefresh\fP or \fBwnoutrefresh\fP.
-.B update_panels
-may be called more than once before a call to
-doupdate(), but doupdate() is the function responsible for updating
-the physical screen.
-.TP
-.B del_panel(pan)
-removes the given panel from the  stack and deallocates the
-\fBPANEL\fR structure (but not its associated window).
-.TP
-.B hide_panel(pan)
-removes the given panel from the panel stack and thus hides it from
-view. The \fBPANEL\fR structure is not lost, merely removed from the stack.
-.TP
-.B panel_hidden(pan)
-returns \fBTRUE\fP if the panel is in the panel stack,
-\fBFALSE\fP if it is not.
-If the panel is a null pointer, return ERR.
-.TP
-.B show_panel(pan)
-makes a hidden panel visible by placing it on top of the panels in the
-panel stack. See COMPATIBILITY below.
-.TP
-.B top_panel(pan)
-puts the given visible panel on top of all panels in the stack.  See
-COMPATIBILITY below.
-.TP
-.B bottom_panel(pan)
-puts panel at the bottom of all panels.
-.TP
-.B move_panel(pan,starty,startx)
-moves the given panel window so that its upper-left corner is at
-\fBstarty\fR, \fBstartx\fR.  It does not change the position of the
-panel in the stack.  Be sure to use this function, not \fBmvwin()\fR,
-to move a panel window.
-.TP
-.B replace_panel(pan,window)
-replaces the current window of panel with \fBwindow\fR (useful, for
-example if you want to resize a panel; if you're using \fBncurses\fR,
-you can call \fBreplace_panel\fR on the output of \fBwresize\fR(3X)).
-It does not change the position of the panel in the stack.
-.TP
-.B panel_above(pan)
-returns a pointer to the panel above pan.  If the panel argument is
-\fB(PANEL *)0\fR, it returns a pointer to the bottom panel in the stack.
-.TP
-.B panel_below(pan)
-returns a pointer to the panel just below pan.  If the panel argument
-is \fB(PANEL *)0\fR, it returns a pointer to the top panel in the stack.
-.TP
-.B set_panel_userptr(pan,ptr)
-sets the panel's user pointer.
-.TP
-.B panel_userptr(pan)
-returns the user pointer for a given panel.
-.TP
-.B panel_window(pan)
-returns a pointer to the window of the given panel.
-.SH DIAGNOSTICS
-Each routine that returns a pointer returns \fBNULL\fR if an error
-occurs. Each routine that returns an int value returns \fBOK\fR if it
-executes successfully and \fBERR\fR if not.
-.SH COMPATIBILITY
-Reasonable care has been taken to  ensure  compatibility
-with  the  native  panel facility introduced in SVr3.2 (inspection of
-the SVr4 manual pages suggests the programming interface is unchanged).
-The \fBPANEL\fR data structures are merely  similar. The  programmer
-is cautioned not to directly use \fBPANEL\fR fields.
-.P
-The functions \fBshow_panel()\fR and \fBtop_panel()\fR are identical
-in this implementation, and work equally well with displayed or hidden
-panels.  In the native System V implementation, \fBshow_panel()\fR is
-intended for making a hidden panel visible (at the top of the stack)
-and \fBtop_panel()\fR is intended for making an already-visible panel
-move to the top of the stack. You are cautioned to use the correct
-function to ensure compatibility with native panel libraries.
-.SH NOTE
-In your library list, libpanel.a should be before libncurses.a; that is,
-you want to say `\-lpanel \-lncurses', not the other way around (which would
-usually give a link-error).
-.SH FILES
-.P
-panel.h
-interface for the panels library
-.P
-libpanel.a
-the panels library itself
-.SH SEE ALSO
-\fBcurses\fR(3X),
-\fBcurs_variables\fR(3X),
+.nf
+\fB#include <panel.h>
 .PP
-This describes \fBncurses\fR
-version @NCURSES_MAJOR@.@NCURSES_MINOR@ (patch @NCURSES_PATCH@).
-.SH AUTHOR
-Originally written by Warren Tucker <wht@n4hgf.mt-park.ga.us>,
-primarily to assist in porting u386mon to systems without a native
-panels library.  Repackaged for ncurses by Zeyd ben-Halim.
+\fBPANEL *new_panel(WINDOW *\fIwin\fP);
+.PP
+\fBint bottom_panel(PANEL *\fIpan\fP);
+\fBint top_panel(PANEL *\fIpan\fP);
+\fBint show_panel(PANEL *\fIpan\fP);
+\fBvoid update_panels(void);
+\fBint hide_panel(PANEL *\fIpan\fP);
+.PP
+\fBWINDOW *panel_window(const PANEL *\fIpan\fP);
+\fBint replace_panel(PANEL *\fIpan\fP, WINDOW *\fIwindow\fP);
+\fBint move_panel(PANEL *\fIpan\fP, int \fIstarty\fP, int \fIstartx\fP);
+\fBint panel_hidden(const PANEL *\fIpan\fP);
+.PP
+\fBPANEL *panel_above(const PANEL *\fIpan\fP);
+\fBPANEL *panel_below(const PANEL *\fIpan\fP);
+.PP
+\fBint set_panel_userptr(PANEL *\fIpan\fP, const void *\fIptr\fP);
+\fBconst void *panel_userptr(const PANEL *\fIpan\fP);
+.PP
+\fBint del_panel(PANEL *\fIpan\fP);
+.PP
+\fI/* ncurses extensions */\fP
+\fBPANEL *ground_panel(SCREEN *\fIsp\fP);
+\fBPANEL *ceiling_panel(SCREEN *\fIsp\fP);
+.fi
+.SH DESCRIPTION
+Panels are \fBcurses\fP(3X) windows with the added property of
+depth.
+Panel functions allow the use of stacked windows and ensure that the
+proper portions of each window and the \fIcurses\fP \fB\%stdscr\fP
+window are hidden or displayed when panels are added,
+moved,
+modified,
+or removed.
+The set of currently visible panels is the stack of panels.
+The
+\fB\%stdscr\fP window is beneath all panels,
+and is not considered part of the stack.
+.PP
+A window is associated with each panel.
+The panel routines enable you to create,
+move,
+hide,
+and show panels.
+You can relocate a panel to any desired position in the stack.
+.PP
+Panel routines are a functional layer added to \fIcurses\fP,
+make only high-level \fIcurses\fP calls,
+and work anywhere \fIcurses\fP does.
+.SH FUNCTIONS
+.\" ---------
+.SS bottom_panel
+\fB\%bottom_panel(\fIpan\fB)\fR
+puts panel \fIpan\fP at the bottom of all panels.
+.\" ---------
+.SS ceiling_panel
+\fB\%ceiling_panel(\fIsp\fB)\fR
+acts like \fB\%panel_below(NULL)\fP
+for the given \fISCREEN\fP \fIsp\fP.
+.\" ---------
+.SS del_panel
+\fB\%del_panel(\fIpan\fB)\fR
+removes the given panel \fIpan\fP from the stack and deallocates the
+\fI\%PANEL\fP structure (but not its associated window).
+.\" ---------
+.SS ground_panel
+\fB\%ground_panel(\fIsp\fB)\fR
+acts like \fB\%panel_above(NULL)\fP
+for the given \fISCREEN\fP \fIsp\fP.
+.\" ---------
+.SS hide_panel
+\fB\%hide_panel(\fIpan\fB)\fR
+removes the given panel \fIpan\fP from the panel stack
+and thus hides it from view.
+The \fI\%PANEL\fP structure is not lost,
+merely removed from the stack.
+.\" ---------
+.SS move_panel
+\fB\%move_panel(\fIpan\fB, \fIstarty\fB, \fIstartx\fB)\fR
+moves the given panel \fIpan\fP's window so that its upper-left corner
+is at
+\fIstarty\fP,
+\fIstartx\fP.
+It does not change the position of the panel in the stack.
+Be sure to use this function,
+not \fB\%mvwin\fP(3X),
+to move a panel window.
+.\" ---------
+.SS new_panel
+\fB\%new_panel(\fIwin\fB)\fR allocates a \fI\%PANEL\fR structure,
+associates it with \fIwin\fP,
+places the panel on the top of the stack
+(causes it to be displayed above any other panel)
+and returns a pointer to the new panel.
+.\" ---------
+.SS panel_above
+\fB\%panel_above(\fIpan\fB)\fR
+returns a pointer to the panel above \fIpan\fP.
+If the panel argument is
+\*(``\fB(PANEL *)0\fP\*('',
+it returns a pointer to the bottom panel in the stack.
+.\" ---------
+.SS panel_below
+\fB\%panel_below(\fIpan\fB)\fR
+returns a pointer to the panel just below \fIpan\fP.
+If the panel argument is
+\*(``\fB(PANEL *)0\fP\*('',
+it returns a pointer to the top panel in the stack.
+.\" ---------
+.SS panel_hidden
+\fB\%panel_hidden(\fIpan\fB)\fR
+returns \fBFALSE\fP if the panel \fIpan\fP is in the panel stack,
+and \fBTRUE\fP if it is not.
+If the panel is a null pointer,
+it returns \fBERR\fP.
+.\" ---------
+.SS panel_userptr
+\fB\%panel_userptr(\fIpan\fB)\fR
+returns the user pointer for a given panel \fIpan\fP.
+.\" ---------
+.SS panel_window
+\fB\%panel_window(\fIpan\fB)\fR
+returns a pointer to the window of the given panel \fIpan\fP.
+.\" ---------
+.SS replace_panel
+\fB\%replace_panel(\fIpan\fB, \fIwindow\fB)\fR
+replaces the current window of panel \fIpan\fP with \fIwindow\fP
+This is useful if,
+for example,
+you want to resize a panel.
+In \fI\%ncurses\fP,
+you can call \fB\%replace_panel\fP
+to resize a panel using a window resized with \fB\%wresize\fP(3X).
+It does not change the position of the panel in the stack.
+.\" ---------
+.SS set_panel_userptr
+\fB\%set_panel_userptr(\fIpan\fB, \fIptr\fB)\fR
+sets the panel's user pointer.
+.\" ---------
+.SS show_panel
+\fB\%show_panel(\fIpan\fB)\fR
+makes a hidden panel visible by placing it on top of the panels in the
+panel stack.
+See \*(``PORTABILITY\*('' below.
+.\" ---------
+.SS top_panel
+\fB\%top_panel(\fIpan\fB)\fR
+puts the given visible panel \fIpan\fP on top of all panels in the
+stack.
+See \*(``PORTABILITY\*('' below.
+.\" ---------
+.SS update_panels
+\fB\%update_panels()\fR
+refreshes the virtual screen to reflect the relations between the panels
+in the stack,
+but does not call \fB\%doupdate\fP(3X) to refresh the physical screen.
+Use this function and not \fB\%wrefresh\fP(3X) or
+\fB\%wnoutrefresh\fP(3X).
+.PP
+\fB\%update_panels\fP may be called more than once before a call to
+\fB\%doupdate\fP,
+but \fB\%doupdate\fP is the function responsible for updating
+the physical screen.
+.SH "RETURN VALUE"
+Each routine that returns a pointer returns \fBNULL\fP if an error
+occurs.
+Each routine that returns an int value returns \fBOK\fP if it
+executes successfully and \fBERR\fP if not.
+.PP
+Except as noted,
+the \fIpan\fP and \fIwindow\fP parameters must be non-null.
+If either is null,
+an error is returned.
+.PP
+The \fB\%move_panel\fP function uses \fBmvwin\fP(3X),
+and returns an error if \fB\%mvwin\fP returns an error.
+.SH NOTES
+The header file \fI\%panel.h\fP itself includes the header file
+\fI\%curses.h\fP.
+.SH PORTABILITY
+Reasonable care has been taken to ensure compatibility
+with the native panel facility introduced in System\ V;
+inspection of the SVr4 manual pages suggests the programming interface
+never changed.
+The \fI\%PANEL\fP data structures are merely similar.
+The programmer is cautioned not to directly use \fI\%PANEL\fP fields.
+.PP
+The functions \fB\%show_panel\fP and \fB\%top_panel\fP are identical
+in this implementation,
+and work equally well with displayed or hidden panels.
+In the System\ V implementation,
+\fB\%show_panel\fP is intended for making a hidden panel visible
+(at the top of the stack)
+and \fB\%top_panel\fP is intended for making an already-visible panel
+move to the top of the stack.
+You are cautioned to use the correct
+function to ensure compatibility with System\ V panel libraries.
+.SH HISTORY
+A panel facility was documented in SVr4.2's
+\fICharacter User Interface Programming\fP document.
+.PP
+It is not part of X/Open Curses.
+.PP
+A few implementations exist:
+.bP
+Systems based on SVr4 source code,
+such as Solaris,
+provide this library.
+.bP
+\fI\%ncurses\fP (since version 0.6 in 1993)
+and \fIPDCurses\fP (since version 2.2 in 1995)
+provide a panel library whose common ancestor
+is a public domain implementation by Warren Tucker
+published in \fIu386mon\fP 2.20 (1990).
+.IP
+According to Tucker,
+the System\ V panel library was first released in SVr3.2 (1988),
+and his implementation helped with a port to SVr3.1 (1987).
+.IP
+Several developers have improved each of these;
+they are no longer the same as Tucker's implementation.
+.bP
+NetBSD 8 (2018)
+has a panel library begun by Valery Ushakov in 2015,
+based on the System\ V documentation.
+.SH AUTHORS
+Warren Tucker <wht@n4hgf.mt\-park.ga.us> originally wrote this
+implementation,
+primarily to assist in porting \fI\%u386mon\fP to systems without a
+native panel library.
+.PP
+Zeyd ben-Halim repackaged it for \fI\%ncurses\fP.
+.PP
+Juergen Pfeifer and Thomas E. Dickey revised and improved the library.
+.SH SEE ALSO
+\fB\%curses\fP(3X),
+\fB\%curs_variables\fP(3X)