You describe the change master record on the Change header screen:
To describe a change master record, proceed as follows:
...
1. Enter a short text that applies to all the objects that can be changed with reference to this change number (for example, bill of material, document, or task list).
2.
If you want to
enter a description that is longer than 40 characters, use the long text
function.
To do this, choose Extras → Chg header long
text. Save your text. Next
to the short text, you see an icon for accessing the long text.
3. Enter the Reason for change, which applies to all objects.
If object management records are supported for the individual change objects (for example, document AD-01 DRW 001 01) of an object type (such as document), you can store specific information on the reason for changing these objects in the object-related management record. It is possible to enter object-specific long texts.