Right-click the shortcut you use to open the program and select properties, then you can set it to open maximized.
Whatever shortcut you're using to launch InDesign; right-click on it and choose Properties
On the Shortcut tab of the Properties dialog, set the Run: menu to Maximized
Perfect!! Thank you! Something so simple - most things are simple if you know the answer... but a pain in the you-know-what if you don't know the answer! Thanks for quick reply.
Thanks, John! You & Peter replied at the exact same time. I appreciate the quick replies.