I know it sounds like a Basic Question and I did google first. Google lead me to edit /wp-admin/edit-form-advanced.php to put target='_blank' there. I did that, but this doesn't seem to affect the 'view page' button on the top of the edit page site. I want it to open in a new tab every time.
In what file/where can I find that button? Can you give advice on how to systematically search such a location for the future?
What is the proper way of doing that and why.
Thanks for letting me know