The most reliable way to bridge the gap between versions is the file format. IDML is a "neutral" version of your document that can be read by almost any version of InDesign from CS4 onwards. How to do it: Open the document in the newer version of InDesign. Go to File > Export .
The converter will process your file and provide a download link for the converted file. how to convert indesign file to older version link
This is the standard way to "downsave" a file for compatibility with : Open your document in the newer version of InDesign. The most reliable way to bridge the gap
To convert an Adobe InDesign (.indd) file to an older version, you must convert it to an file . Standard .indd files are not backward compatible and will fail to open in older software versions without this step. 🛠️ Step-by-Step Conversion Guide Go to File > Export