Replace Bulk Labels from Space Pages

Select Label Manager from Space Tools menu.
Click Replace Bulk Labels tab from Page Labels menu and enter the name of the label(s) to be replaced.
Choose pages to replace labels from space pages.
For Large Spaces

If a page contains too many child pages, please select "Parent page and all child pages will be affected" option.
A confirmation screen will be displayed on the following step. Click next to continue.
After content selection and process completed a success message will be displayed.

Label Manager for Confluence