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Try it!
Create and format a post or announcement to start a conversation in a channel.
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Type a message.
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Select Format.
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To create an announcement, select a post type > Announcement.
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Type a headline, and then add a color scheme or your own background image.
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Format your post with the following options:
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Add a subject
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Bold
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Bulleted list
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Insert link
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6. Select Send.