diff --git a/common/content/dactyl.js b/common/content/dactyl.js
index f5824435..1bb6a68a 100644
--- a/common/content/dactyl.js
+++ b/common/content/dactyl.js
@@ -605,6 +605,10 @@ var Dactyl = Module("dactyl", XPCOM(Ci.nsISupportsWeakReference, ModuleBase), {
      * Initialize the help system.
      */
     initHelp: function (force) {
+        // Waits for the add-on to become available, if necessary.
+        config.addon;
+        config.version;
+
         if (force || !this.helpInitialized) {
             if ("noscriptOverlay" in window) {
                 noscriptOverlay.safeAllow("chrome-data:", true, false);
diff --git a/common/content/modes.js b/common/content/modes.js
index 2840ea6c..4976db15 100644
--- a/common/content/modes.js
+++ b/common/content/modes.js
@@ -207,6 +207,51 @@ var Modes = Module("modes", {
 
             }
         });
+
+        function makeTree() {
+            let list = modes.all.filter(function (m) m.name !== m.description);
+
+            let tree = {};
+
+            for (let mode in values(list))
+                tree[mode.name] = {};
+
+            for (let mode in values(list))
+                for (let base in values(mode.bases))
+                    tree[base.name][mode.name] = tree[mode.name];
+
+            let roots = iter([m.name, tree[m.name]] for (m in values(list)) if (!m.bases.length)).toObject();
+
+            default xml namespace = NS;
+            function rec(obj) {
+                XML.ignoreWhitespace = XML.prettyPrinting = false;
+
+                let res = <ul dactyl:highlight="Dense" xmlns:dactyl={NS}/>;
+                Object.keys(obj).sort().forEach(function (mode) {
+                    res.* += <li><em>{mode}</em>: {modes.getMode(mode).description}{
+                        rec(obj[mode])
+                    }</li>;
+                });
+
+                if (res.*.length())
+                    return res;
+                return <></>;
+            }
+
+            return rec(roots).toXMLString();
+        }
+
+        util.timeout(function () {
+            // Waits for the add-on to become available, if necessary.
+            config.addon;
+            config.version;
+
+            services["dactyl:"].pages["modes.dtd"] = services["dactyl:"].pages["modes.dtd"]();
+        });
+
+        services["dactyl:"].pages["modes.dtd"] = function () [null,
+            util.makeDTD(iter({ "modes.tree": makeTree() },
+                              config.dtd))];
     },
     cleanup: function cleanup() {
         modes.reset();
@@ -278,9 +323,13 @@ var Modes = Module("modes", {
 
     // show the current mode string in the command line
     show: function show() {
+        if (!loaded.modes)
+            return;
+
         let msg = null;
-        if (options.get("showmode").getKey(this.main.name, true))
+        if (options.get("showmode").getKey([this.main].concat(this.main.allBases), false))
             msg = this._getModeMessage();
+
         if (msg || loaded.commandline)
             commandline.widgets.mode = msg || null;
     },
@@ -452,7 +501,7 @@ var Modes = Module("modes", {
             this === obj || this.allBases.indexOf(obj) >= 0 || callable(obj) && this instanceof obj,
 
         allBases: Class.memoize(function () {
-            let seen = {}, res = [], queue = this.bases;
+            let seen = {}, res = [], queue = this.bases.slice();
             for (let mode in array.iterValues(queue))
                 if (!set.add(seen, mode)) {
                     res.push(mode);
@@ -552,45 +601,47 @@ var Modes = Module("modes", {
             function () { events.feedkeys("<Esc>"); });
     },
     options: function initOptions() {
-        options.add(["passunknown"],
+        let opts = {
+            completer: function completer(context, extra) {
+                if (extra.value && context.filter[0] == "!")
+                    context.advance(1);
+                return completer.superapply(this, arguments);
+            },
+
+            getKey: function getKey(val, default_) {
+                if (isArray(val))
+                    return (array.nth(this.value, function (v) val.some(function (m) m.name === v.mode), 0)
+                                || { result: default_ }).result;
+
+                return set.has(this.valueMap, val) ? this.valueMap[val] : default_;
+            },
+
+            setter: function (vals) {
+                modes.all.forEach(function (m) { delete m.passUnknown });
+
+                vals = vals.map(function (v) update(new String(v.toLowerCase()), {
+                    mode: v.replace(/^!/, "").toUpperCase(),
+                    result: v[0] !== "!"
+                }));
+
+                this.valueMap = values(vals).map(function (v) [v.mode, v.result]).toObject();
+                return vals;
+            },
+
+            validator: function validator(vals) vals.map(function (v) v.replace(/^!/, "")).every(set.has(this.values)),
+
+            get values() array.toObject([[m.name.toLowerCase(), m.description] for (m in values(modes._modes)) if (!m.hidden)])
+        };
+
+        options.add(["passunknown", "pu"],
             "Pass through unknown keys in these modes",
             "stringlist", "!text_edit,!input,base",
-            {
-                completer: function completer(context, extra) {
-                    if (extra.value && context.filter[0] == "!")
-                        context.advance(1);
-                    return completer.superapply(this, arguments);
-                },
-
-                getKey: function getKey(val, default_) {
-                    if (isArray(val))
-                        return (array.nth(this.value, function (v) val.some(function (m) m.name === v.mode), 0)
-                                    || { result: default_ }).result;
-
-                    return set.has(this.valueMap, val) ? this.valueMap[val] : default_;
-                },
-
-                setter: function (vals) {
-                    modes.all.forEach(function (m) { delete m.passUnknown });
-
-                    vals = vals.map(function (v) update(new String(v.toLowerCase()), {
-                        mode: v.replace(/^!/, "").toUpperCase(),
-                        result: v[0] !== "!"
-                    }));
-
-                    this.valueMap = values(vals).map(function (v) [v.mode, v.result]).toObject();
-                    return vals;
-                },
-
-                validator: function validator(vals) vals.map(function (v) v.replace(/^!/, "")).every(set.has(this.values)),
-
-                get values() array.toObject([[m.name.toLowerCase(), m.description] for (m in values(modes._modes)) if (!m.hidden)])
-            });
+            opts);
 
         options.add(["showmode", "smd"],
             "Show the current mode in the command line when it matches this expression",
-            "regexplist", "!^normal$",
-            { regexpFlags: "i" });
+            "stringlist", "!normal,base",
+            opts);
     },
     prefs: function initPrefs() {
         prefs.watch("accessibility.browsewithcaret", function () modes.onCaretChange.apply(modes, arguments));
diff --git a/common/locale/en-US/map.xml b/common/locale/en-US/map.xml
index 7b777129..92b0291a 100644
--- a/common/locale/en-US/map.xml
+++ b/common/locale/en-US/map.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-stylesheet type="text/xsl" href="dactyl://content/help.xsl"?>
 
-<!DOCTYPE document SYSTEM "dactyl://content/dtd">
+<!DOCTYPE document SYSTEM "dactyl://content/modes.dtd">
 
 <document
     name="map"
@@ -75,6 +75,15 @@
     saved via the <ex>:mk&dactyl.name;rc</ex> command.
 </warning>
 
+<p tag="modes">
+    The following tree represents all of the modes understood by
+    dactyl. Mappings for a mode also apply to its children and
+    descendants. So a mapping in the BASE mode, for instance, is
+    also active in NORMAL and EX mode.
+</p>
+
+&modes.tree;
+
 <h3 tag=":map-commands">Map commands</h3>
 
 <item>
diff --git a/common/locale/en-US/options.xml b/common/locale/en-US/options.xml
index b130321c..080fe4c1 100644
--- a/common/locale/en-US/options.xml
+++ b/common/locale/en-US/options.xml
@@ -1143,6 +1143,21 @@
     </description>
 </item>
 
+<item>
+    <tags>'pu' 'passunknown'</tags>
+    <spec>'passunknown' 'pu'</spec>
+    <type>&option.showmode.type;</type>
+    <default>&option.showmode.default;</default>
+    <description>
+        <p>
+            Pass unknown keys through to &dactyl.host; in these
+            <t>modes</t>. The first element matching a currently
+            active mode is the one that takes effect. Modes may be
+            negated by prefixing them with a <tt>!</tt>.
+        </p>
+    </description>
+</item>
+
 <item>
     <tags>'pps' 'popups'</tags>
     <spec>'popups' 'pps'</spec>
@@ -1330,13 +1345,17 @@
 </item>
 
 <item>
-    <tags>'nosmd' 'noshowmode'</tags>
     <tags>'smd' 'showmode'</tags>
     <spec>'showmode' 'smd'</spec>
     <type>&option.showmode.type;</type>
     <default>&option.showmode.default;</default>
     <description>
-        <p>Show the current mode in the command line if it matches this expression.</p>
+        <p>
+            Show the current mode in the command line if it or any
+            of its parent <t>modes</t> is included in the list.
+            Modes may be negated by prefixing them with a
+            <tt>!</tt>.
+        </p>
     </description>
 </item>
 
diff --git a/common/locale/en-US/tabs.xml b/common/locale/en-US/tabs.xml
index 25e668c8..64138dcb 100644
--- a/common/locale/en-US/tabs.xml
+++ b/common/locale/en-US/tabs.xml
@@ -384,7 +384,7 @@
 <h2 tag="app-tabs application-tabs pinned-tabs">Application Tabs</h2>
 
 <item>
-    <tags>pin pintab</tags>
+    <tags>:pin :pintab</tags>
     <spec><oa>count</oa>pin<oa>tab</oa><oa>!</oa> <oa>arg</oa></spec>
     <description>
         <p>
@@ -396,7 +396,7 @@
 </item>
 
 <item>
-    <tags>unpin unpintab</tags>
+    <tags>:unpin :unpintab</tags>
     <spec><oa>count</oa>pin<oa>tab</oa> <oa>arg</oa></spec>
     <description>
         <p>
diff --git a/common/modules/commands.jsm b/common/modules/commands.jsm
index 7f40a961..3c60ad87 100644
--- a/common/modules/commands.jsm
+++ b/common/modules/commands.jsm
@@ -1573,7 +1573,7 @@ var Commands = Module("commands", {
                 ]
             })),
             iterateIndex: function (args) let (tags = services["dactyl:"].HELP_TAGS)
-                this.iterate(args).filter(function (cmd) cmd.hive === commands.builtin || set.has(cmd.helpTag)),
+                this.iterate(args).filter(function (cmd) cmd.hive === commands.builtin || set.has(tags, cmd.helpTag)),
             format: {
                 headings: ["Command", "Group", "Description"],
                 description: function (cmd) template.linkifyHelp(cmd.description + (cmd.replacementText ? ": " + cmd.action : "")),
diff --git a/common/modules/config.jsm b/common/modules/config.jsm
index cb18251f..bc67e657 100644
--- a/common/modules/config.jsm
+++ b/common/modules/config.jsm
@@ -206,7 +206,7 @@ var ConfigBase = Class("ConfigBase", {
         "version"
     ],
 
-    helpStyles: /^(Help|StatusLine|REPL)|^(Boolean|Indicator|MoreMsg|Number|Object|Logo|Key(word)?|String)$/,
+    helpStyles: /^(Help|StatusLine|REPL)|^(Boolean|Dense|Indicator|MoreMsg|Number|Object|Logo|Key(word)?|String)$/,
     styleHelp: function styleHelp() {
         if (!this.helpStyled) {
             const { highlight } = require("highlight");
@@ -457,6 +457,9 @@ var ConfigBase = Class("ConfigBase", {
         CompMore::after      content: "⌄";
 
 
+        Dense              margin-top: 0; margin-bottom: 0;
+
+
         EditorEditing;;*   background: #bbb !important; -moz-user-input: none !important; -moz-user-modify: read-only !important;
         EditorError;;*     background: red !important;
         EditorBlink1;;*    background: yellow !important;
diff --git a/pentadactyl/NEWS b/pentadactyl/NEWS
index f852b61b..79321c2d 100644
--- a/pentadactyl/NEWS
+++ b/pentadactyl/NEWS
@@ -181,8 +181,10 @@
         triggers when the URL begins as above. [b1]
       - Added 's' flag to 'pageinfo' and changed default value. [b7]
       - Added 'passkeys' option. [b3]
+      - Added 'passunknown' option. [b7]
       - Changed 'urlseparator' default value to "|". [b3]
       - Added "passwords" and "venkman" dialogs to :dialog. [b2]
+      - Make 'showmode' a stringlist option. [b7]
       - Added 'wildanchor' option. [b2]
       - Added 'cookies', 'cookieaccept', and 'cookielifetime' options. [b3]
     • Added BookmarkChange, BookmarkRemove autocommands. [b2]