The Progress Bar legacy macros are a pair of macros used to preserve migrated progress bars you created with Content Formatting Macros for Confluence Server or Data Center. These macros are read-only. If your migrated content contains Progress Bar Container and Progress Bar Step macros, they will be rendered in the legacy macros.
Migrated Progress Bar macros are rendered in Confluence's legacy editor similar to the example below.
The legacy macro parameters are read-only and you cannot add macros to a legacy container macro. To add new progress bars to a migrated page, use the Progress Bar macro.