which location in backstage view, if clicked, opens the location where users can open the autocorrect dialog box?

In Backstage view, you click Options to get to the place where you can open the AutoCorrect dialog box.

More precisely in Word:

1. Click the File tab to open Backstage view.

2. Click Options at the bottom of the left pane.

3. In the Word Options window, choose Proofing , then click AutoCorrect Options to open the AutoCorrect dialog box.

So the correct location in Backstage view is Options.