You can add annotations to attributes, and observe events for them.

您可以将附注加入至属性，并为其观察事件。

youdao

We'll add annotations, and it'll become something historians and students can use.

我们会对这些地方加注，然后就会成为对历史学家和学生有用的东西。

youdao

Once you've cropped the screenshot, you'll be able to add annotations as before, all from a very nice UI.

一旦你裁剪完截图后，你将会可以像之前一样的添加注释，这一切都来自于一个很优秀的界面。

youdao

Tonara is an intelligent sheet music app for iPad that actively listens to the music you play and turns the pages for you, lets your record and share what you are playing and add annotations to your sheet music.

FORBES: Tonara: An Intelligent Music App

Annotations: Users can add graphical notes to any item in Word, Excel or PowerPoint with a single tap.

ENGADGET: CloudOn announces new features, worldwide availability on iOS and Android