diff --git a/legacy/evas/src/lib/canvas/evas_object_textblock.c b/legacy/evas/src/lib/canvas/evas_object_textblock.c
index 9640917b06..2adfddcc71 100644
--- a/legacy/evas/src/lib/canvas/evas_object_textblock.c
+++ b/legacy/evas/src/lib/canvas/evas_object_textblock.c
@@ -6526,6 +6526,9 @@ _evas_textblock_cursor_is_at_the_end(const Evas_Textblock_Cursor *cur)
* This behavior is because visible formats are like characters and invisible
* should be stacked in a way that the last one is added last.
*
+ * This function works with native formats, that means that style defined
+ * tags like
won't work here. For those kind of things use markup prepend.
+ *
* @param cur the cursor to where to add format at.
* @param format the format to add.
* @return Returns true if a visible format was added, false otherwise.
@@ -6656,6 +6659,9 @@ evas_textblock_cursor_format_append(Evas_Textblock_Cursor *cur, const char *form
* should be stacked in a way that the last one is added last.
* If the format is visible the cursor is advanced after it.
*
+ * This function works with native formats, that means that style defined
+ * tags like
won't work here. For those kind of things use markup prepend.
+ *
* @param cur the cursor to where to add format at.
* @param format the format to add.
* @return Returns true if a visible format was added, false otherwise.