It’s the second entry of the menu: “History”. If you have internal links in your ebook, after clicking them, you should be able to click on “Previous”, right after “History”, and go back to your previous location.
Perfect, thanks. I did try that before but it didn’t work. But I see now that one has to be very careful to tap previous right away before doing anything else.
It should be kept in memory even if you turn the page or select other options in the menu (and if you jump to yet another page through the Table of Contents or an internal link, you should be able to return to your original location by tapping on “Previous” twice). The history is lost when you reload the webpage, and partially lost if you tap on “Previous” and then jump to another page through TOC or an internal link: what was on “Next” at that point is deleted.
Are you having a different experience?