Convert earlier versions of InDesign documents

 To convert previous versions of InDesign documents to the current version, choose File > Open and open the file.

Keep in mind the following points:

• If you used third-party plug-ins to create an earlier version of a document, check with the manufacturer to make sure that they are installed correctly for and are compatible with InDesign CS4 before you convert the document.

• When you convert a document, you may see an alert message asking if you want to use the exception word list in the user dictionary or the one in the document. For information about this alert message, see Choosing word lists when opening documents.

• Library files created in earlier versions of InDesign will open and convert in InDesign CS4, even if the library is locked. You have to specify a name and location for the converted library files; the default naming convention is filename‑X.indl.

• InDesign CS3 can’t open InDesign CS4 documents directly. To open an InDesign CS4 document in InDesign CS3, you must do two thing. First, choose File > Export in InDesign CS4 to save the document in INX format. Second, update InDesign CS3 with special plug‑ins. (See Save backwards to the previous InDesign version.)