Packaging an InDesign document is an effective way of collecting all of the images and fonts into a single directory.
Packaging can be done to prepare the document for printing by an external vendor, or it can be done simply to gather together linked images from a disparate collection of directories.
TO PACKAGE AN INDESIGN DOCUMENT:
Before packaging a document:
1. Conduct a preflight check. Choose Window > Output > Preflight to check for errors.
2. Check and correct spelling. Choose Edit > Spelling > Check Spelling.
When you are ready, choose File > Package.