You can save document settings for page
size, columns, margins, and bleed and slug areas in a preset to
save time and ensure consistency when creating similar documents.
Choose File > Document Presets >
Define.
Click New in the dialog box that appears.
Specify a name for the preset and select basic layout
options in the New Document Preset dialog box. (See New Document options for a description of each option.)
Click OK twice.
You can save a document preset to a separate
file and distribute it to other users. To save and load document
preset files, use the Save and Load buttons in the Document Presets
dialog box.