When in the Document_New procedure in ThisDocument of Normal.dotm, it does not run. If the Navigation Pane was closed when Word was closed, then it does not activate the Navigation Pane. It does not activate the Styles Pane upon Word startup.

When a new document is created with Word open, it runs showing both panes and adjusting the width as set in the macro.

If in the Document_Open procedure in ThisDocument in Normal.dotm, it has no effect on Word's startup status for either pane. When a document or template is opened from Windows explorer, it has no effect. When a document is opened using File > Open from within Word, it runs.

Curiouser and curiouser! perplex.jpg


@NitroPress
I suspect you will need to have Word already open to have the macros I gave earlier work for you. Warn your users!