Add an existing hashtag via the Post Editor
Click Share Something to open the Post Editor.
Enter the # symbol and begin typing the hashtag text.
Select a tag from the dropdown.
Add an existing hashtag via the Review Post Details screen
Click Share Something to open the Post Editor.
Enter the title and content of the post and click Publish.
From the Review Post Details screen, begin typing the hashtag text in the Tags field.
Select a tag from the dropdown.
Add an existing hashtag to a published post via the activity stream
Click the post options ellipsis.
Select Edit Tags.
From the Edit Post Details screen, begin typing the hashtag text in the Tags field.
Select a tag from the dropdown.
Click Update.