How do I save a class announcement?

Click the class. On the Stream page, click Share something with your class. Enter your announcement and click Post. Note: As you type your announcement, Classroom automatically saves it and puts a draft in Saved announcements at the top of the stream.
For More Information Please Refer:
https://support.google.com/edu/classroom/answer/6020270?co=GENIE.Platform%3DDesktop&hl=en
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