diff --git a/src/resources/docs/markdown_guide_en.md b/src/resources/docs/markdown_guide_en.md
index 157de232..f1d0e9ae 100644
--- a/src/resources/docs/markdown_guide_en.md
+++ b/src/resources/docs/markdown_guide_en.md
@@ -156,11 +156,16 @@ VNote supports [Graphviz](http://www.graphviz.org/) to draw diagrams. You should
 
 ### Math Formulas
 
-> You need to enable MathJax in the `Markdown` menu.
+> You need to enable MathJax in the `Markdown` menu and restart VNote.
 
-VNote supports math formulas via [MathJax](https://www.mathjax.org/). The default math delimiters are `$$...$$` and `\[...\]` for **displayed mathematics**, and `$...$` for **inline mathematics**. Sometimes you may need to *escape* some characters via `\`.
+VNote supports math formulas via [MathJax](https://www.mathjax.org/). The default math delimiters are `$$...$$` for **displayed mathematics**, and `$...$` for **inline mathematics**.
 
-VNote also supports displayed mathematics via fenced code block with language `mathjax` specified. The benifit of using code block is you do not have to escape most characters.
+- Inline mathematics should not cross multiple lines;
+- Forms like `3$abc$`, `$abc$4`, `$ abc$`, and `$abc $` will not be treated as mathematics;
+- Use `\` to escape `$`;
+- There should be only space chars before opening `$$` and after closing `$$`;
+
+VNote also supports displayed mathematics via fenced code block with language `mathjax` specified.
 
     ```mathjax
     $$
diff --git a/src/resources/docs/markdown_guide_zh.md b/src/resources/docs/markdown_guide_zh.md
index 22aaabb0..60c6011f 100644
--- a/src/resources/docs/markdown_guide_zh.md
+++ b/src/resources/docs/markdown_guide_zh.md
@@ -157,11 +157,16 @@ VNote支持 [Graphviz](http://www.graphviz.org/) 来绘制图表。您需要使
 
 ### 数学公式
 
-> 需要在`Markdown`菜单中启用MathJax。
+> 需要在`Markdown`菜单中启用MathJax，并重启VNote。
 
-VNote通过 [MathJax](https://www.mathjax.org/) 来支持数学公式。默认的**块公式**的分隔符是`$$...$$$`和`\[...\]`，**行内公式**的分隔符是`$...$`。有时候，您需要使用`\`来*转义*某些字符。
+VNote通过 [MathJax](https://www.mathjax.org/) 来支持数学公式。默认的**块公式**的分隔符是`$$...$$`，**行内公式**的分隔符是`$...$`。
 
-VNote也可以使用标明语言`mathjax`的代码块来实现块公式。使用代码块的一个好处是大多数情况下无需转义字符。
+- 行内公式不能跨多行；
+- 形如`3$abc$`/`$abc$4`/`$ abc$`和`$abc $`的不会被解析为公式；
+- 使用`\`转义`$`；
+- 开始的`$$`之前以及结束的`$$`之后都只允许出现空格字符；
+
+VNote也可以使用标明语言`mathjax`的代码块来实现块公式。
 
     ```mathjax
     $$