You can open a C/C++ declaration editor from a diagram editor to
make modifications to the source code of C/C++ classes and data types.
You must be in the
C/C++ perspective and have
a diagram open in the diagram editor.
Note: Changes made to the
source code are automatically reflected in the corresponding diagram.
To open a C/C++ declaration editor, in the diagram editor, right-click
a C/C++ classifier; then click.
A C/C++ source code editor opens in which you can edit the source
code of a C/C++ declaration header file.
Note: To open the default C/C++ editor, you can double-click
a C/C++ classifier or relationship.