diff --git a/images/viii-b-mac-vm-settings-1.jpg b/images/viii-b-mac-vm-settings-1.jpg
new file mode 100644
index 00000000..b3f8b2c4
Binary files /dev/null and b/images/viii-b-mac-vm-settings-1.jpg differ
diff --git a/images/xxvii-d-keymap-learn-1.gif b/images/xxvii-d-keymap-learn-1.gif
new file mode 100644
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Binary files /dev/null and b/images/xxvii-d-keymap-learn-1.gif differ
diff --git a/installation-directory-introduce.md b/installation-directory-introduce.md
index 7d3c3bae..93cd4665 100644
--- a/installation-directory-introduce.md
+++ b/installation-directory-introduce.md
@@ -58,4 +58,8 @@
 
 # Linux 的配置文件保存路径
 
-- 跟 Windows 的目录命名习惯一样，所以你可以直接按 Windows 的配置目录名称来全盘搜索。
\ No newline at end of file
+- 跟 Windows 的目录命名习惯一样，所以你可以直接按 Windows 的配置目录名称来全盘搜索。
+
+# Mac 下修改 VM 参数
+
+![JVM 配置说明](images/viii-b-mac-vm-settings-1.jpg)
diff --git a/keymap-introduce.md b/keymap-introduce.md
index c7274662..ac181d65 100644
--- a/keymap-introduce.md
+++ b/keymap-introduce.md
@@ -26,6 +26,12 @@ IntelliJ IDEA 的便捷操作性，快捷键的功劳占了一大半，对于各
 
 可能还有其他一些软件，比如网易云音乐、有道词典等等这些软件都可能存在快捷键冲突，所以为了 IntelliJ IDEA 这些软件的快捷键都是值得舍弃的，如果你在开发的时候。
 
+
+![前提](images/xxvii-d-keymap-learn-1.gif)
+
+> * IntelliJ IDEA 官方出的学习辅助插件：IDE Features Trainer：<https://plugins.jetbrains.com/plugin/8554?pr=idea>
+
+
 ## Ctrl
 
 |快捷键|介绍|
diff --git a/plugins-settings.md b/plugins-settings.md
index 6ab08de3..2dabff86 100644
--- a/plugins-settings.md
+++ b/plugins-settings.md
@@ -41,7 +41,7 @@
 
 |插件名称    |插件介绍      |官网地址        |
 |:-----------------|:----------|:--------------|
-|IntelliJ IDEA 官方出的学习辅助插件：IDE Features Trainer|https://plugins.jetbrains.com/plugin/8554?pr=idea|
+|IntelliJ IDEA 官方出的学习辅助插件：IDE Features Trainer|<https://plugins.jetbrains.com/plugin/8554?pr=idea>|
 |Key promoter|快捷键提示|<https://plugins.jetbrains.com/plugin/4455?pr=idea>|
 |String Manipulation|驼峰式命名和下划线命名交替变化|<https://plugins.jetbrains.com/plugin/2162?pr=idea>|
 |CheckStyle-IDEA|代码规范检查|<https://plugins.jetbrains.com/plugin/1065?pr=idea>|