Documentation update

README.adoc

@@ -7,9 +7,7 @@ https://docs.xfce.org/panel-plugins/xfce4-genmon-plugin[Generic Monitor
 
 image::https://i.imgur.com/UVSz6QB.gif[]
 
-It is *important that both the color scheme and the icon theme have both light
+*It is important to set the desired color schemes before use* (see Settings).
-and dark variants*. For example, the Adwaita and Adwaita-dark GTK style and
-the Elementary and Elementary-dark icon theme are such.
 
 * https://gitlab.com/bimlas/xfce4-night-mode (main repository)
 * https://github.com/bimlas/xfce4-night-mode (mirror, *please star if you like the plugin*)
@@ -46,6 +44,18 @@ to the settings (see later).
 
 For settings, open the XFCE Settings Editor -> `night-mode` channel.
 
+To find out what values to enter, set the color schemes you want and copy them
+from the appropriate location:
+
+* GTK theme
+** `xsettings/Net/ThemeName`
+* Icon theme
+** `xsettings/Net/IconThemeName`
+* Cursor theme
+** `xsettings/Gtk/CursorThemeName`
+* Window manager theme
+** `xfwm4/general/theme`
+
 === Switch at a time specified by antoher program
 
 For example, to use http://jonls.dk/redshift/[Redshift] or another program to

xfce4-night-mode.sh

@@ -153,4 +153,12 @@ echo "<tool>
   Night mode: $SUNSET - $SUNRISE
   Click to toggle mode for a while
   Use \`xfce4-settings-editor\` -> \`night-mode\` to modify settings
+
+  To find out what values to enter, set the color schemes you want and copy
+  them from the appropriate location:
+
+  * GTK theme: \`xsettings/Net/ThemeName\`
+  * Icon theme: \`xsettings/Net/IconThemeName\`
+  * Cursor theme: \`xsettings/Gtk/CursorThemeName\`
+  * Window manager theme: \`xfwm4/general/theme\`
 </tool>"