Update Text_format.md

Text_format.md

@@ -25,4 +25,16 @@ Syntax: Use the tag `<u>` to wrap the content.
 <u>Underline text</u>    
 # Footnote
 Footnotes are used to add supplementary notes, explanations or citations to text.  
-[^Footnote]: not only 
+`[^Footnote]: not only for technology,but also dream.`  
+Syntax:`[^name]: Text.`  
+# Inline Code
+Inline code is used to mark code snippets, commands, variable names and other content in the main text.  
+Basic syntax:Wrap the content with a single backtick.    
+Code containing backticks: Use two backticks to wrap the content.  
+For example: `` `code` ``.
+Important! Add spaces between the inner backtick and the outer pair.  
+# Text Highlight (Extended Syntax)
+Text highlight is not part of standard Markdown, but it is supported by many extended versions.   
+This is a ==Highlight text== .  
+You can also use the HTML tag `<mark>highlight text</mark>`.  
+<mark>highlight text</mark>