diff --git a/twander.1 b/twander.1
index 59fbf3d..d331ee3 100644
--- a/twander.1
+++ b/twander.1
@@ -3,7 +3,7 @@
 Wander around a filesystem executing commands of your choice on selected
 files.
 .SH SYNOPSIS
-twander [-bcfhnqswvxy] [startdir]
+twander [-bcfhnqrswvxy] [startdir]
 .SH DESCRIPTION
 \'twander\' is a GUI-based file tree navigation tool.  It lets you "wander"
 through your file system at will.  Unlike other similar programs,
@@ -16,52 +16,61 @@
 .SH OPTIONS
 .TP
 .B startdir
-directory in which to begin (default: ./)
+Directory in which to begin. (default: ./)
 
 .TP
 .B -b backcolor
-desired background color (default: black)
+Desired background color. (default: black)
 
 .TP
 .B -c path/name of configuration file
-specify the location and name of the configuration
-file you wish to use. (default is ~/.twander)
+Specify the location and name of the configuration
+file. (default is ~/.twander)
 
 .TP
 .B -f forecolor
-desired foreground color (default: green)
+Desired foreground color. (default: green)
 
 .TP
 .B -h
-print this help information
+Print this help information.
 
 .TP
 .B -n fontname
-name of desired font family (e.g., courier, times, helvetica) (default: courier)
+Name of desired font family. (e.g., courier, times, helvetica) (default: courier)
 
 .TP
 .B -q
-quiet mode - suppresses warnings (default: warnings on)
+Quiet mode - suppresses warnings. (default: warnings on)
+
+.TP
+.B -r
+Turn off automatic refreshing of directory display. (default: refresh on)
+This is useful on slow machines (or slow X connections) and/or
+when working with very large directories.  In this situtation, the
+frequent updating of the \'twander\' display can make the program
+unacceptably slow and unresponsive.  In this case you can still
+force an update manually with the \'Control-l\' key.
 
 .TP
 .B -s fontsize
-font size in points (default: 12)
+Font size in points. (default: 12)
 
 .TP
 .B -v
-print detailed version information.
+Print detailed version information.
 
 .TP
 .B -w fontweight
-one of:  bold, italic, underline, overstrike (default: bold)
+One of:  bold, italic, underline, overstrike. (default: bold)
 
 .TP
 .B -x width
-set window width (default: 60)
+Set window width. (default: 60)
 
 .TP
 .B -y width
-set window width (default: 25)
+Set window width. (default: 25)
 
 .SH PREASSIGNED KEYS
 
@@ -266,8 +275,12 @@
 .fi
 
 .SH OTHER
-You must have \'python\' 2.2 or later installed as well as Tkinter 
-support installed for that release.
+You must have \'python\' 2.2 or later installed as well as \'Tkinter\'
+support installed for that release.  In the case of Win32, \'Tkinter\'
+is bundled with the standard Windows \'python\' distribution.  In
+the case of Unix, you may have to first install \'python\' and
+then the appropriate release of \'Tkinter\'.  This is the case,
+for example, with FreeBSD.
 
 .SH BUGS AND MISFEATURES
 The color options (-b, -f), font options (-n, -s, -w), and size option