Reply To: Buttons back to last visited page

I believe you can add this action to the button in Indesign itself ^^
Place your button on your master page (assuming you want it to appear to all of your pages).
Then select it, open the Button and form panel, add an action and choose “Go to previous view”.
If you check your button properties in Acrobat, you should see it executes a Menu command > View > Navigation > Previous view.
Of course, as usual with interactive PDF, do not expect buttons to work properly outside Acrobat pro or reader…