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+.\" Copyright (c) 1999 - Sun Microsystems, Inc.
+.\" All rights reserved.
+.\" 
+.\" Permission is hereby granted, free of charge, to any person obtaining a
+.\" copy of this software and associated documentation files (the
+.\" "Software"), to deal in the Software without restriction, including
+.\" without limitation the rights to use, copy, modify, merge, publish,
+.\" distribute, and/or sell copies of the Software, and to permit persons
+.\" to whom the Software is furnished to do so, provided that the above
+.\" copyright notice(s) and this permission notice appear in all copies of
+.\" the Software and that both the above copyright notice(s) and this
+.\" permission notice appear in supporting documentation.
+.\" 
+.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+.\" OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+.\" HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
+.\" INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
+.\" FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+.\" NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+.\" WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\" 
+.\" Except as contained in this notice, the name of a copyright holder
+.\" shall not be used in advertising or otherwise to promote the sale, use
+.\" or other dealings in this Software without prior written authorization
+.\" of the copyright holder.
+.\"
+.TH XkbAddGeomOverlayKey __libmansuffix__ __xorgversion__ "XKB FUNCTIONS"
+.SH NAME
+XkbAddGeomOverlayKey \- Add a key to an existing overlay row
+.SH SYNOPSIS
+.B XkbOverlayKeyPtr XkbAddGeomOverlayKey
+(
+.I overlay,
+.I row,
+.I under
+)
+.br
+      XkbOverlayPtr \fIoverlay\fP\^;
+.br
+      XkbRowPtr \fIrow\fP\^;
+.br
+      char * \fIunder\fP\^;
+.if n .ti +5n
+.if t .ti +.5i
+.SH ARGUMENTS
+.TP
+.I \- overlay
+overlay to be updated
+.TP
+.I \- row
+row in overlay to be updated
+.TP
+.I \- under
+primary name of the key to be considered 
+.SH DESCRIPTION
+.LP
+Xkb provides functions to add a single new element to the top-level keyboard 
+geometry. In each case the 
+.I num_ * 
+fields of the corresponding structure is incremented by 1. These functions do 
+not change 
+.I sz_* 
+unless there is no more room in the array. Some of these functions fill in the 
+values of the element's structure from the arguments. For other functions, you 
+must explicitly write code to fill the structure's elements.
+
+The top-level geometry description includes a list of 
+.I geometry properties. 
+A geometry property associates an arbitrary string with an equally arbitrary 
+name. Programs that display images of keyboards can use geometry properties as 
+hints, but they are not interpreted by Xkb. No other geometry structures refer 
+to geometry properties.
+
+.I XkbAddGeomOverlayKey 
+adds one key to the 
+.I row 
+in the 
+.I overlay. 
+If there is no key named 
+.I under 
+in the row of the underlying section, 
+.I XkbAddGeomOverlayKey 
+returns NULL.
+.SH STRUCTURES
+.LP
+.nf
+
+    typedef struct _XkbOverlayKey {
+        XkbKeyNameRec           over;      /\(** name of this overlay key */
+        XkbKeyNameRec           under;     /\(** name of the key under this overlay key */
+    } XkbOverlayKeyRec,*XkbOverlayKeyPtr;
+.fi
+