diff --git a/doc/api/editorInfo.md b/doc/api/editorInfo.md
index 05656bce7..31361a750 100644
--- a/doc/api/editorInfo.md
+++ b/doc/api/editorInfo.md
@@ -39,6 +39,13 @@ Returns the `rep` object.
 ## editorInfo.ace_performDocumentApplyAttributesToCharRange(?)
 ## editorInfo.ace_setAttributeOnSelection(?)
 ## editorInfo.ace_toggleAttributeOnSelection(?)
+## editorInfo.ace_getAttributeOnSelection(attribute)
+Returns a boolean if an attribute exists on a selected range.
+The attribute should be the string name of the attribute applied to the selection IE subscript
+Example usage: Apply the activeButton Class to a button if an attribute is on a highlighted/selected caret position or range.
+Example: `call.editorInfo.ace_getAttributeOnSelection("subscript");` // call here is the callstack from aceEditEvent.
+See the ep_subscript plugin for an example of this function in action.
+Notes: Does not work on first or last character of a line.  Suffers from a race condition if called with aceEditEvent.
 ## editorInfo.ace_performSelectionChange(?)
 ## editorInfo.ace_doIndentOutdent(?)
 ## editorInfo.ace_doUndoRedo(?)