When you use the AODocs Smartbar, your documents in Google Drive must be displayed in list view and not in grid view.
To switch from grid view to list view, open Google Drive and click the List view button.
When you have switched to list view, your Google Drive interface looks like this:
Note: Smartbar features are available in the Google Drive file preview for Google files and non-Google files. You can access the file preview directly from grid mode.