diff --git a/61.md b/61.md
index c6a5dc2..e4d1d62 100644
--- a/61.md
+++ b/61.md
@@ -17,6 +17,11 @@ The `.content` of these events is the content of the danmaku comment.
 The list of tags are as follows:
 * `i` (required) universally unique identifier of the video. The format is `<platform (lowercase)>:<identity>` where `<platform>` is the platform of the video and `<identity>` is the unique identifier of the video on that platform. For example, a YouTube video with the identifier `aA-jiiepOrE` would have the identifier `youtube:aA-jiiepOrE`.
 * `time` (required) the time of the video when the danmaku comment is sent in seconds.
+* `duration` (optional) the duration of the danmaku comment shown in seconds.
+* `speed` (optional) the speed of the danmaku comment in pixels per second.
+* `color` (optional) the color of the danmaku comment in hexadecimal format.
+
+Any other styling tags are allowed. And, client implementations should ignore any tags they do not understand.
 
 ```jsonc
 {