control startup settings
Can you be more specific? Are you trying to set up system defaults?
InDesign's "startup settings" are called Preferences. They are found under the Edit menu (Windows) or the InDesign CC menu (Mac).
To set preferences for all new documents, set preferences with no document open.
To set preferences for the current document, choose Edit > Preferences or InDesign CC > Preferences.
Thanks, Steve. Semantics! Is that is my new Mac OS book?
Steve addressed system defaults in InDesign. In Photoshop, all preferences are in sticky state: they will keep the last settings until you reset tools or preferences, whether or not a document is open.