A hashtag starts with a '#' and don't contain any spaces.  It can be used to quickly locate related messages.  There are a couple of ways to create a hashtag.  By putting one in the subject line of a post, if allowed by the group setup, it will automatically be created.  Moderators with the proper permissions, as well as group owners, can create them in advance.  By default, hashtags will be a dark blue rectangle with white letters.

There are a few hashtag names that are reserved and created by the system as needed.

To create hashtags ahead of time:

1.  Go to the group

2.  Go to the Messages screen if you're not already there.

3.  Click on the button that says $HashTags.

4.  On the screen that opens, click on the +Create HashTag button at the bottom of the page.

5.  Another screen will open where you can enter details, including Alias, Description, Duration, and Color.  There are also some options that you may want to set.

6.  When you're done, click on the +Create HashTag button and you'll be taken back to the screen with the list of hashtags.

If you want to change settings for a hashtag, click on the name of it to open an editor screen.  Be sure to click Update HashTag at the bottom when you're done making changes.  If you decide not to make a change, you can click on Cancel.  This is also where you can Delete the hashtag.