Whether you’re the designer or recipient, it’s courteous to back save an InDesign file, in the case that your recipient does not have the Creative Cloud subscription and newest version. You can always open an older file; however, you cannot open a file created with a newer version of InDesign, unless you have a .idml available.
How to Convert a JPG to a Transparent PNG in Adobe Photoshop
April 10, 2015/ Updated: September 4, 2022