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Combine or split subdocuments

On the View menu, click Outline.
If the subdocuments are collapsed, on the Outlining toolbar (toolbar: A bar with buttons and options that you use to carry out commands. To display a toolbar, press ALT and then SHIFT+F10.), click Expand Subdocuments .
If the subdocuments you want to combine or split are locked, unlock them.

Click anywhere in the subdocument you want to unlock.
On the Outlining toolbar, click Lock Document .

Do one of the following:

Show Combine subdocuments

If you do not see the subdocument icon , click Master Document View Button image on the Outlining toolbar.

Move the subdocuments you want to combine so that they are next to one another.

To select the subdocument you want to move, click its subdocument icon . To select multiple adjacent subdocuments, click the first icon, and then hold down SHIFT as you click the last icon in the group.
Drag the subdocument icon to a new location.

Select the first subdocument you want to combine by clicking its subdocument icon .
Hold down SHIFT as you click the last subdocument icon in the group of subdocuments that you want to combine.
On the Outlining toolbar, click Merge Subdocument .

Notes

When you save the master document (master document: A "container" for a set of separate files (or subdocuments). You can use a master document to set up and manage a multipart document, such as a book with several chapters.), Microsoft Word saves the combined subdocuments with the file name of the first subdocument in the combination.
When you combine subdocuments (for example, documents A, B, and C), the "uncombined" versions of the subdocument files (documents B and C) remain in their original location.

Show Split a subdocument into two subdocuments

Create a heading for the new subdocument. Then apply a built-in heading style (heading style: Formatting applied to a heading. Microsoft Word has nine different built-in styles: Heading 1 through Heading 9.) or outline level (outline level: Paragraph formatting you can use to assign a hierarchical level (Level 1 through Level 9) to paragraphs in your document. For example, after you assign outline levels, you can work with the document in outline view or in the Document Map.) to the heading.

On the Outlining toolbar, click Promote to increase the heading level.
On the Outlining toolbar, click Demote to decrease the heading level.

Select the heading for the new subdocument.
On the Outlining toolbar, click Split Subdocument .

Notes

When you save the master document (master document: A "container" for a set of separate files (or subdocuments). You can use a master document to set up and manage a multipart document, such as a book with several chapters.), Microsoft Word assigns a file name to the new subdocument based on the first characters in the subdocument's heading.

If you combine subdocuments and then split them back into separate documents, Word saves the split subdocument with a new file name.

Applies to:

Word 2003