diff --git a/TODO.md b/TODO.md
index 27a9f2a6..6f08af3b 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,9 +1,8 @@
 #TO DO for V3.9
 
-User's Guide updates:
- - Change references to Standard skin to Seasons.
- - Mention the Mobile and Smartphone skins.
+Customizing Guide updates:
  - Document how new skin defaults work
 
-Root level `log_success` and `log_failure` are now documented. They should work for reports,
-but how about other things, in particular the uploaders?
+`log_success` and `log_failure`
+ - Check documentation
+ - They should work for reports, but how about other things, in particular the uploaders?
diff --git a/docs/customizing.htm b/docs/customizing.htm
index d67b33e5..20a16169 100644
--- a/docs/customizing.htm
+++ b/docs/customizing.htm
@@ -30,8 +30,8 @@
 
     <div class="header">
         <div class="logoref">
-            <a href='http://weewx.com'> <img src='images/logo-weewx.png' class='logo' style="float:right" alt="weewx logo"/>
-            </a><br/> <span class='version'>
+            <a href='http://weewx.com'> <img src='images/logo-weewx.png' class='logo' style="float:right"
+                                             alt="weewx logo"/> </a><br/> <span class='version'>
 Version: 3.9
     </span>
         </div>
@@ -665,7 +665,7 @@ db_manager.getSql("SELECT SUM(rain) FROM %s "\
             distribution.
         </p>
         <p>
-            <a href="#general_options">General options</a> are covered in the next section, while look-and-feel options
+            <a href="#General_options">General options</a> are covered in the next section, while look-and-feel options
             are covered under <a href="#standard_skin">Reference to <span class="code">skin.conf</span> options</a>.
         </p>
 
@@ -679,15 +679,19 @@ db_manager.getSql("SELECT SUM(rain) FROM %s "\
             interval.
         </p>
 
-        <h1 id="general_options">General options</h1>
+        <h1 id="General_options">General options</h1>
 
         <h2>Overview of general options</h2>
 
         <p>
-            This section covers a suite of "general options," which control things like what unit system to use, how an
-            observation type should be labelled and formatted, <i>etc.</i> They can be changed in one of two different
-            sections in <span class="code">weewx.conf</span>, depending on the "scope" over which you want the change to
-            apply. The table below summarizes:
+            This section covers a suite of "general options," which control things such as what unit system to use for
+            reports, how an observation type should be labelled and formatted, <i>etc.</i> A detailed reference guide to
+            all the options can be found below in section <a href="#Reference_guide_to_general_options"><span
+            class="code">Reference guide to general options</span></a>.
+        </p>
+        <p>
+            General options can be changed in one of two different sections in <span class="code">weewx.conf</span>,
+            depending on the "scope" over which you want the change to apply. The table below summarizes:
         </p>
 
         <table class="indent" style="width: 60%">
@@ -897,7 +901,7 @@ db_manager.getSql("SELECT SUM(rain) FROM %s "\
         <p>This section is a reference for all the general options, normally found in <span
             class="code">[Defaults]</span> in <span class="code">weewx.conf</span></p>
 
-        <h2>Reference guide to general options</h2>
+        <h2 id="Reference_guide_to_general_options">Reference guide to general options</h2>
 
         <h3 class="config_section">[Units]</h3>
 
@@ -4162,7 +4166,7 @@ class MyStats(SearchList):                                                   # 1
         <h2>Modify the general options</h2>
 
         <p>
-            Next, you will need to go through the <a href="#general_options">general options</a> in the section <span
+            Next, you will need to go through the <a href="#General_options">general options</a> in the section <span
             class="code">[Defaults]</span> in <span class="code">weewx.conf</span>, translating labels and modifying
             formats to follow local conventions.
         </p>
diff --git a/docs/usersguide.htm b/docs/usersguide.htm
index 482d9338..a1983c45 100644
--- a/docs/usersguide.htm
+++ b/docs/usersguide.htm
@@ -2055,22 +2055,23 @@ longitude = -77.0366</pre>
         <h3 class="config_section" id="stock_reports">[[SeasonsReport]]<br/> [[SmartphoneReport]]<br/>
             [[MobileReport]]<br/> [[StandardReport]]</h3>
 
-        <p>These are the four reports that actually generate HTML files and plots. They all ship in the standard WeeWX
-            distribution. They all use US Customer units by default, but this can be changed by either editing their
-            respective <span class="code">skin.conf</span> configuration files, or <a
-                href="customizing.htm#overriding_from_weewx_conf">by overriding from the main configuration file, <span
-                class="code">weewx.conf</span></a>.
+        <p>
+            These are the four reports that actually generate HTML files and plots. They all ship in the standard WeeWX
+            distribution. They all use US Customary units by default, but this can be changed by editing section <a
+            href="#Section_Defaults"><span class="code">[Defaults]</span></a>.
         </p>
         <p>They all have the following options in common.</p>
 
         <p class="config_option">skin</p>
-        <p>Where to find the specifications for the skin. This should include any templates and the skin configuration
-            file, <span class="code">skin.conf</span>. This should be a subdirectory under <span class="symcode">SKIN_ROOT</span>.
+        <p>
+            Where to find the skin. This should be a subdirectory under <span class="symcode">SKIN_ROOT</span>. Inside
+            the directory should be any templates used by the skin and a skin configuration file, <span class="code">skin.conf</span>.
         </p>
 
         <p class="config_important">enable</p>
-        <p>Set to <span class="code">true</span> (the default) to enable the processing of this skin. Set to <span
-            class="code">false</span> to disable.
+        <p>
+            Set to <span class="code">true</span> to enable the processing of this skin. Set to <span
+            class="code">false</span> to disable. If this option is missing, <span class="code">True</span> is assumed.
         </p>
 
         <p class="config_option">HTML_ROOT</p>
@@ -2194,7 +2195,8 @@ longitude = -77.0366</pre>
             databases. You must chose a unit system and then stick with it. This means that users coming from wview
             (which uses US Customary) should not change the default setting. Having said this, there is a way of
             reconfiguring the database to use another unit system. See the section <a
-                href="customizing.htm#Changing_the_unit_system">Changing the unit system</a> in the Customization Guide.
+                href="customizing.htm#Changing_the_unit_system">Changing the unit system</a> in the <a
+                href="customizing.htm">Customization Guide</a>.
         </p>
 
         <p class='note'><strong>Note!</strong><br/> This service only affects the units used in the <em>databases</em>.
@@ -2220,8 +2222,8 @@ longitude = -77.0366</pre>
             class="code">METRIC</span> is that the former uses <span class="code">mm</span> instead of <span
             class="code">cm</span> for rain, and <span class="code">m/s</span> instead of <span
             class="code">km/hr</span> for wind speed. See the Appendix <a href="customizing.htm#units"> Units</a> in the
-            Customization Guide for the exact differences beween these three choices. Default is <span
-                class="code">US</span>.
+            <a href="customizing.htm">Customization Guide</a> for the exact differences beween these three choices.
+            Default is <span class="code">US</span>.
         </p>
 
         <h2 class="config_section" id="StdCalibrate">[StdCalibrate]</h2>
@@ -2341,7 +2343,7 @@ longitude = -77.0366</pre>
             each derived quantity.
         </p>
 
-        <p class="config_option">ignore_zero_wind</p>
+        <p class="config_option" id="ignore_zero_wind">ignore_zero_wind</p>
 
         <p>
             Indicates whether the wind direction should be undefined when the wind speed is zero. The default value is
@@ -2651,6 +2653,14 @@ longitude = -77.0366</pre>
             Default is <span class="code">INNODB</span>.
         </p>
 
+        <h2 class="config_section" id="Section_Defaults">[Defaults]</h2>
+        <p>
+            This section covers a suite of "general options," which control things such as which unit system should be
+            used in reports, what label to be used for an observation type, and how it should be formatted. Details can
+            be found in <a href="customizing.htm#General_options"><em>General options</em></a> in the <a
+            href="customizing.htm">Customization Guide</a>.
+        </p>
+
         <h2 class="config_section">[Engine]</h2>
 
         <p>
@@ -3545,10 +3555,10 @@ May 14 13:35:23 web weewx[5633]:         ****  Generator terminated...</pre>
         <h3 id="zero_windspeed">There is no wind direction when wind speed is zero</h3>
 
         <p>
-            This is by design - if there is no wind, then the wind direction is undefined. An undefined value is
-            represented by a NULL in the database or a None in Python. This policy is enforced by the <span
-            class='code'>StdWXCalculate</span> service. If necessary, it can be overridden. See the <a
-            href="#StdWXCalculate"><span class='code'>StdWXCalculate</span></a> section for instructions.
+            This is by design &mdash; if there is no wind, then the wind direction is undefined, represented by NULL
+            in the database or None in Python. This policy is enforced by the <span class='code'>StdWXCalculate</span>
+            service. If necessary, it can be overridden. See option <a href="#ignore_zero_wind"><span class="code">ignore_zero_wind</span></a>
+            in the <a href="#StdWXCalculate"><span class='code'>[StdWXCalculate]</span></a> section.
         </p>
         <p>
             WeeWX distinguishes between a value of zero and no value (NULL or None). However, some services do not make