Amazon CodeCatalyst is no longer open to new customers. Existing customers can continue to use the service as normal. For more information, see [How to migrate from CodeCatalyst](migration.md).

# Adding, editing, or deleting comments
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You can leave a comment on an issue. In the comments you can tag other space members, other projects in the space, related issues, and code.

**To add a comment to an issue**

1. Navigate to your project.

1. In the navigation bar choose **Issues**.

1. Choose the issue where you want to add the comment. For help on finding your issue, see [Finding and viewing issues](issues-view.md).

1. Enter the comment in the **Comments** field. You can use Markdown to add formatting.

1. Choose **Send**.

**To edit a comment**

You can edit comments you make on issues. You can only edit comment that you authored.

1. Navigate to your project.

1. In the navigation bar choose **Issues**.

1. Choose the issue where you want to edit a comment. For help on finding your issue, see [Finding and viewing issues](issues-view.md).

1. To edit a comment, find the comment you want to edit.
**Tip**  
You can sort comments by oldest or newest first. Comments are loaded 10 at a time.

1. Choose the ellipsis icon, then choose **Edit**.

1. Edit the comment. You can use Markdown to add formatting.

1. Choose **Save**. The comment is now updated.

**To delete a comment**

You can delete comments you make on issues. You can only delete comments that you authored. When a comment is deleted, your user name will show, but with the words *This comment has been deleted* in place of the original comment text.

1. Navigate to your project.

1. In the navigation bar choose **Issues**.

1. Choose the issue where you want to delete a comment. For help on finding your issue, see [Finding and viewing issues](issues-view.md).

1. Choose the ellipsis icon, choose **Delete**, and then choose **Confirm**.

# Using mentions in a comment
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You can mention space members, other projects in the space, related issues, and code in comments. Doing so creates a quick link to the user or resource you mention.

**To @mention in a comment**

1. Navigate to your project.

1. In the navigation bar choose **Issues**.

1. Choose the issue that you want to edit to view the issue details. For help on finding your issue, see [Finding and viewing issues](issues-view.md).

1. Choose the **Add a comment** textbox.

1. Type `@user_name` to mention another user.

1. Type `@project_name` to mention a project.

1. Type `@issue_name` or `@issue_number` to mention another issue.

1. Type `@file_name` to mention specific files or code in a source repository.
**Note**  
A list of the top 5 items (users, source repositories, projects, etc) containing the terms that match your `@mention` will populate as you type.

1. Choose the desired item you would like to mention. The pathway showing where the item is located will populate in the comment textbox.

1. Finish your comment and choose **Send**.