Message indicating newer version of InDesign
In InDesign CS6 and CC, you can send documents to anyone using older versions of InDesign without extra steps like manually exporting to IDML. Compatibility is built right in, ensuring that your documents always open just as you would expect.
If you open a document created in a newer version of InDesign, a message is displayed indicating the different version. To convert the document to the current version of InDesign, do the following:
1To convert the document to the current version of InDesign, click Convert.
The document is uploaded to the Adobe Creative Cloud and then converted to the current version of InDesign.
Note: You need to be connected to the Internet to perform the conversion.
2After the document is successfully converted to the current version, the Save As dialog box prompts you to save the document.