You can easily edit attributes in Author mode by using the Attributes View and Oxygen XML Editor also allows you to edit attribute and element values in-place, directly in the Author mode, using an in-place attribute editor.
Full Tags with Attributes,
Full Tags,
Block Tags, or
Inline Tags.This opens an in-place attributes editor that contains the same content as the Attributes view. By default, this editor presents the Name and Value fields, with the list of all the possible attributes collapsed.
Figure: In-place Attributes Editor
Figure: In-place Attributes Editor (Full Version)
The full version includes a table grid, similar to the Atributes view, that presents all the attributes for the selected element.