By default, when you select a Rich-text item in a document, you can only display its content. If you switch to advanced mode, you can edit its content.
It is possible to recover corrupted Rich-text fields with this feature by deleting the corrupted composite items.
The composite items list contains the main elements of the rich-text item. You can Right-click > Delete on any composite item to delete it. When you select a composite item, its sub-items will be displayed.
Once you select a composite item, all it's sub-items will be displayed on the right side of this panel. You can Right-click > Edit on any sub-item to edit its value. Some sub-items are read-only, such as the sub-item of PabDefinition .