There are two possible reasons. If you cannot see this option in any Idea from any location, then it’s likely not enabled in your site’s configuration setup; you’ll need to submit a request to Support to change this setting (note that this setting is for the entire site, not just a specific event). If you cannot see this option only in a specific location, then you are likely viewing the Idea from a reviewer worklist. The Actions menu is intentionally abbreviated in the worklist view to preserve space. To determine if this is the case, use Browse Ideas or a filter to locate and view the Idea, and then open the Actions menu.