For the following steps you need Confluence Administrator permissions.
Create Global Metadata
In order to create global metadata, you need to be a Confluence Administrator. Global metadata will be available in all Confluence spaces and helps maintain consistent metadata systemwide. To create global metadata, you first have to create at least one global metadata field and then add the field(s) to a global metadata set. Finally, you can assign your new set(s) to existing pages via bulk change.
Create a Global Metadata Field
As a Confluence administrator, go into the General Configuration and look for "Metadata Plugin" on the left sidebar. Click the entry "Metadata fields". You will now see the following overview:
Image 1: General Administration - Global Metadata Overview (click to enlarge)
Click "Add Metadata Field" on the right. This will lead you to the configuration screen for global metadata fields.
Image 2: General Administration - Add Global Metadata Field (click to enlarge)
You can now enter a title, choose a field type or enter a description for the field. The title is mandatory.
Fields can have the following type:
Multi Select (Checkboxes)
Single Select (Dropdown)
Link (add one or more links)
Single Select (Radio Buttons)
Text
User
Date
When choosing the field type "link", you can restrict which internal links can be selected by the users with the help of a filter. Filters are defined according to the Lucene search syntax.
Image 3: Restrict Internal Links (click to enlarge)
Add Global Metadata Fields to a Global Metadata Set
The entry "Metadata sets" can also be found in the "Metadata Plugin" section on the left sidebar. On the page, click "Add metadata set" on the right to create a new set.
Image 4: General Administration - Add Global Metadata Set (click to enlarge)