Original help says you cannot affect this setting for Published Assessments, but Help indicates that you click on 'Published Assessments' and make changes to settings there. Change to 'Core Assessments'.
Editing metadata in assessments
Note: To complete the procedures in this document, you must be assigned a role having the necessary permissions. To determine your role, follow the directions in Participant roles. To view a list of permissions associated with a given role, see Permissions, roles, and tools. For a basic understanding of roles and permissions, see Permissions and Roles: Overview.
Note: You should not use the feedback option in Tests & Quizzes when assessing learning, as it may provide information students can use to correct their answers before submitting a test.
Once you publish an assessment, you cannot change the metadata. Before you publish an assessment, you can edit its metadata from the Settings page. To do so, follow these steps:
1. In the menubar of the relevant course or project site, click Tests & Quizzes.
PROBLEM IS HERE IN #2
2. From the Assessments page, under "Published Assessments", click Settings beneath the title of your assessment.
3. Click the black triangle next to "Metadata".
4. Add any keywords, objectives, and rubrics in the provided text fields. Additionally, you can select Questions to record metadata for the questions in your assessment.
5. Click Save Settings.
If you follow the instructions above and the metadata field is not accessible, you will need to create a new assessment type that includes access to the metadata field. To do so, see Adding/creating, editing, or deleting an Assessment Type.