page preview missing margins button

I’m on libreOffice on Win7 and after clicking page preview button I’m missing the margins button that I could swear used to be there.
After clicking it, you could then move the margins up or down and left or right.
Where’s the button or how can I still do this w/o it.

ps. yes, I know you can do Format → Page when not in preview mode to change the margins…but that’s a lot of number entering and guessing its exactly where you want the margins, then previewing, then going back, rinse, repeat.

I made a test in v and also miss the graphical borders.