Metadata editor is a visual tool for editing metadata.
Metadata Editor opens during creation of metadata from flat file (the two upper panes), database or when you create metadata by hand.
You can also open Metadata Editor to edit any existing metadata.
If you want to edit any metadata assigned to an edge (both internal and external), you can do it in the Graph Editor pane in one of the following ways:
Double-click the edge.
Select the edge and press Enter.
Right-click the edge and select from the context menu.
If you want to edit any metadata (both internal and external), you can do it after expanding the category in the Outline pane:
Double-click the metadata item.
Select the metadata item and press Enter.
Right-click the metadata item and select from the context menu.
If you want to edit any external (shared) metadata from any project, you can do it after expanding the subfolder in the Navigator pane:
Double-click the metadata file.
Select the metadata file and press Enter.
Right-click the metadata file and select → from the context menu.