diff --git a/action_basics/src/main/java/icons/ActionBasicsIcons.java b/action_basics/src/main/java/icons/ActionBasicsIcons.java
index bfd0e4392..931f270a4 100644
--- a/action_basics/src/main/java/icons/ActionBasicsIcons.java
+++ b/action_basics/src/main/java/icons/ActionBasicsIcons.java
@@ -3,10 +3,8 @@
 package icons;
 
 import com.intellij.openapi.util.IconLoader;
-
 import javax.swing.*;
 
 public class ActionBasicsIcons {
-public static final Icon Sdk_default_icon = IconLoader.getIcon("/icons/sdk_16.svg");
-
+  public static final Icon Sdk_default_icon = IconLoader.getIcon("/icons/sdk_16.svg");
 }
diff --git a/action_basics/src/main/java/org/intellij/sdk/action/CustomDefaultActionGroup.java b/action_basics/src/main/java/org/intellij/sdk/action/CustomDefaultActionGroup.java
index 52af8cd1d..1badc6da8 100644
--- a/action_basics/src/main/java/org/intellij/sdk/action/CustomDefaultActionGroup.java
+++ b/action_basics/src/main/java/org/intellij/sdk/action/CustomDefaultActionGroup.java
@@ -27,8 +27,6 @@ public class CustomDefaultActionGroup extends DefaultActionGroup {
     // Enable/disable depending on whether user is editing
     Editor editor = event.getData(CommonDataKeys.EDITOR);
     event.getPresentation().setEnabled(editor != null);
-    // Always make visible.
-    event.getPresentation().setVisible(true);
     // Take this opportunity to set an icon for the menu entry.
     event.getPresentation().setIcon(ActionBasicsIcons.Sdk_default_icon);
   }
diff --git a/action_basics/src/main/resources/META-INF/plugin.xml b/action_basics/src/main/resources/META-INF/plugin.xml
index ee75db068..684a22395 100644
--- a/action_basics/src/main/resources/META-INF/plugin.xml
+++ b/action_basics/src/main/resources/META-INF/plugin.xml
@@ -10,8 +10,12 @@
   <!-- The version of this plugin -->
   <version>2.0.0</version>
 
-  <!-- Compatible with the following versions of IntelliJ Platform -->
-  <idea-version since-build="183" until-build=""/>
+  <!-- Compatible with the following versions of IntelliJ Platform:
+        version 2018.3 (build #183) and newer. -->
+  <idea-version since-build="183"/>
+
+  <!-- Indicate this plugin can be loaded in all IntelliJ Platform-based products. -->
+  <depends>com.intellij.modules.platform</depends>
 
   <!-- Text to display as description on Preferences/Settings | Plugin page  -->
   <description>
@@ -33,56 +37,21 @@
   <vendor url="https://plugins.jetbrains.com">IntelliJ Platform SDK</vendor>
 
   <actions>
-    <!-- The <action> element defines an action to register.
-    The mandatory "id" attribute specifies an unique identifier for the action.
-    The mandatory "class" attribute specifies the full-qualified name of the class implementing the action.
-    The mandatory "text" attribute specifies the text of the action (tooltip for toolbar button or text for menu item).
-    The optional "use-shortcut-of" attribute specifies the ID of the action whose keyboard shortcut this action will use.
-    The optional "description" attribute specifies the text which is displayed in the status bar when the action is focused.
-    The optional "icon" attribute specifies the icon which is displayed on the toolbar button or next to the menu item. -->
+    <!-- See https://www.jetbrains.org/intellij/sdk/docs/basics/action_system.html#registering-actions-in-pluginxml
+          for information about the elements and attributes used for actions and groups. -->
+    <!-- This <action> element adds a static menu item in first position of the Tools menu that shows PopupDialogAction. -->
     <action id="org.intellij.sdk.action.PopupDialogAction" class="org.intellij.sdk.action.PopupDialogAction"
             text="Pop Dialog Action" description="SDK Action Example" icon="ActionBasicsIcons.Sdk_default_icon">
-      <!-- The <keyboard-shortcut> node specifies the keyboard shortcut for the action. An action can have several keyboard shortcuts.
-      The mandatory "first-keystroke" attribute specifies the first keystroke of the action. The key strokes are specified according to the regular Swing rules.
-      The optional "second-keystroke" attribute specifies the second keystroke of the action.
-      The mandatory "keymap" attribute specifies the keymap for which the action is active. IDs of the standard keymaps are defined as
-      constants in the com.intellij.openapi.keymap.KeymapManager class. -->
       <keyboard-shortcut first-keystroke="control alt A" second-keystroke="C" keymap="$default"/>
-      <!-- The <mouse-shortcut> node specifies the mouse shortcut for the action. An action can have several mouse shortcuts.
-      The mandatory "keystroke" attribute specifies the clicks and modifiers for the action. It is defined as a sequence of words separated by spaces:
-      "button1", "button2", "button3" for the mouse buttons; "shift", "control", "meta", "alt", "altGraph" for the modifier keys;
-      "doubleClick" if the action is activated by a double-click of the button.
-      The mandatory "keymap" attribute specifies the keymap for which the action is active. IDs of the standard keymaps are defined as
-      constants in the com.intellij.openapi.keymap.KeymapManager class. -->
       <mouse-shortcut keystroke="control button3 doubleClick" keymap="$default"/>
-      <!-- The <add-to-group> node specifies that the action should be added to an existing group. An action can be added to several groups.
-      The mandatory "group-id" attribute specifies the ID of the group to which the action is added.
-      The group must be implemented by an instance of the DefaultActionGroup class.
-      The mandatory "anchor" attribute specifies the position of the action in the group relative to other actions. It can have the values
-      "first", "last", "before" and "after".
-      The "relative-to-action" attribute is mandatory if the anchor is set to "before" and "after", and specifies the action before or after which
-      the current action is inserted. -->
       <add-to-group group-id="ToolsMenu" anchor="first"/>
     </action>
-    <!--
-    The <group> element defines an action group to register.
-        "id" attribute - mandatory, specifies an unique identifier for the group.
-        "class" attribute - optional, specifies the full-qualified name of the class implementing the group.
-          If omitted, the ActionGroup implementation will be constructed by the IntelliJ Platform Framework.
-        "popup" attribute - mandatory, specifies whether the group will be shown as a popup in menus.
-        "text" attribute - mandatory, specifies the text of the action group to be displayed in the menu, or tooltip for toolbar button.
-        "description" attribute - optional, specifies the text which is displayed in the status bar when the action is focused.
-        "icon" attribute - optional, specifies the icon which is displayed on the toolbar button or next to the menu item.
-      The <add-to-group> element - see documentation above for attributes.
-      The <action> element - optional, used for static declarations of action(s) within a group, but can be
-      omitted if actions will be added at runtime. See documentation above for attributes.
-    -->
-    <!-- All off the following menu groups add the action SimplePopDialogAction to menus in different ways.
-      Note the action ids are unique. -->
+    <!-- All of the following menu groups add the action PopupDialogAction to menus in different ways.
+          Note that even though these groups reuse the same action class, in each use the action ids are unique. -->
     <!-- GroupedActions demonstrates declaring an action group using the default ActionGroup implementation provided by the
-      IntelliJ Platform framework. (Note the lack of a "class" attribute.) GroupedActions gets inserted after PopupDialogAction
-      in the Tools menu. Because the group's implementation is default, it cannot impose enable/disable conditions. Instead it
-      must rely on the conditions imposed by the parent menu where it is inserted. It declares one action in the group. -->
+          IntelliJ Platform framework. (Note the lack of a group "class" attribute.) GroupedActions gets inserted after PopupDialogAction
+          in the Tools menu. Because the group's implementation is default, it cannot impose enable/disable conditions. Instead it
+          must rely on the conditions imposed by the parent menu where it is inserted. It declares one action in the group. -->
     <group id="org.intellij.sdk.action.GroupedActions" text="Static Grouped Actions" popup="true" icon="ActionBasicsIcons.Sdk_default_icon">
       <add-to-group group-id="ToolsMenu" anchor="after" relative-to-action="org.intellij.sdk.action.PopupDialogAction"/>
       <action class="org.intellij.sdk.action.PopupDialogAction" id="org.intellij.sdk.action.GroupPopDialogAction"
@@ -90,7 +59,7 @@
       </action>
     </group>
     <!-- CustomDefaultActionGroup demonstrates declaring an action group based on a ActionGroup class supplied by this plugin.
-      This group is to be inserted atop the Editor Popup Menu. It declares one action in the group. -->
+          This group is to be inserted atop the Editor Popup Menu. It declares one action in the group. -->
     <group id="org.intellij.sdk.action.CustomDefaultActionGroup" class="org.intellij.sdk.action.CustomDefaultActionGroup" popup="true"
             text="Popup Grouped Actions" description="Custom DefaultActionGroup Demo" icon="ActionBasicsIcons.Sdk_default_icon">
       <add-to-group group-id="EditorPopupMenu" anchor="first"/>
@@ -98,7 +67,7 @@
               text="A Popup Action" description="SDK Popup Grouped Action Example" icon="ActionBasicsIcons.Sdk_default_icon"/>
     </group>
     <!-- DynamicActionGroup demonstrates declaring an action group without a static action declaration.
-     An action is added to the group programmatically in the DynamicActionGroup implementation. -->
+          An action is added to the group programmatically in the DynamicActionGroup implementation. -->
     <group id="org.intellij.sdk.action.DynamicActionGroup" class="org.intellij.sdk.action.DynamicActionGroup" popup="true"
             text="Dynamically Grouped Actions" description="SDK Dynamically Grouped Action Example" icon="ActionBasicsIcons.Sdk_default_icon">
       <add-to-group group-id="ToolsMenu" anchor="after" relative-to-action="org.intellij.sdk.action.GroupedActions"/>