This is part of the Inspect activity.
In the Production module's Thumbnail view, select the appendix or appendices that you want to move.
Select > . (Optionally, press .) The border of selected pages changes to a gray, dashed line, and a blinking cursor appears after the last selected page.
Using the left and right arrow keys on your keyboard, move the cursor to where you want the appendix(ices) to be, and select > (). You can move the appendix or appendices to a new position:
between documents or between documents in a compound – the appendix or appendices become a new document
inside an existing document or a document in a compound – the appendix or appendices become part of this document
Select any page in the document that you cut the appendix or appendices from, and select > .
again for the document you pasted the appendix or appendices into—or for the new document, if you created one.
If you move invoice appendices in an invoice solution that uses Invoice modules, and if DoPageIdentificationInInterpret is set to 1 in Eilocal.ini (which by default it is not), then your action can potentially be undone by the Extract activity.