Publish button not in article edit page

1. Click Setup.

2. Under Builder, click Customize.

3. Click Knowledge.

4. Click Article Actions.

5. Click Edit.

On the Publish Article Action field, you may choose All- this will reveal Publish Button for all Article Managers (user with Manage Article permission) with CRED permission on respective article types or choose specific public groups.

Note: This is only applicable to Salesforce Classic. Remember that article types have been replaced by record types in Lightning Knowledge.