Add once attribute to custom lists so attributes only apply to curr…

…ent item

docs/devGuide/projectManagement.md

@@ -381,4 +381,4 @@ Note that:
   * Result: 'tlylt' will be updated to have both icons(code and doc)
 
 {% from "njk/common.njk" import previous_next %}
-{{ previous_next('githubActions/markbindReusableWorkflows', 'styleGuides') }}
+{{ previous_next('githubActions/markbindReusableWorkflows', 'styleGuides') }}

docs/userGuide/syntax/lists.md

@@ -72,6 +72,33 @@ Markdown can also be used in texts.
 You may need to add escape characters when using special characters for Markdown in text. 
 </box>
 
+**You can add an icon or text that only applies to a specific item by using the `once` attribute.**
+
+<include src="codeAndOutput.md" boilerplate >
+<variable name="highlightStyle">markdown</variable>
+<variable name="code">
+* Item 1 { icon="glyphicon-education" }
+* Item 2 { icon="fas-code-branch" once=true }
+  * Item 2.1
+  * Item 2.2
+* Item 3
+  </variable>
+</include>
+
+Subsequent items at the same level will not inherit icons or texts with the `once` attribute and will instead inherit the icons or texts before it.
+
+The `once` attribute also applies to all other attributes such as `i-size` and `t-size` as seen below.
+
+<include src="codeAndOutput.md" boilerplate >
+<variable name="highlightStyle">markdown</variable>
+<variable name="code">
+* Item 1 { icon="glyphicon-education" i-size="40px" i-class="text-primary" }
+* Item 2 { i-size="25px" once=true }
+  * Sub-item 2.1
+* Item 3
+  </variable>
+</include>
+
 **You can adjust the icon and text's size by using the `i-size` and `t-size` attribute respectively.**
 
 <include src="codeAndOutput.md" boilerplate >