Ha, ha, .... I tried to explain what the problem is in my postings ... sorry for my english - danish is my first language, not english.
But I got the message ... you wants some screendumps ;-), and here they are - but I have to say some words too:
Here is my main menu form as it comes up in the Access enviroment just after I dobble click on it:

Notice it has a V-scrollbar to the right and there is plenty of space 'under' the form.
I can manually adjust the V-scrollbar to fit the form in the enviroment - and the V-scrollbar disappears again - look here, and I admit the height of the form is close to the avaiable space on the screen but it CAN fit there (unless there are some of what
I called 'outer margin' outside the frame of the form !):

I would think the properties in the circle her is what SHOULD control that behavior:
But obviously the form does:
1) NOT Autocenter - at least not UP/DOWN
2) it DOES Autosize - I beleave it has to do with the 'outer frame' around the form - it adapts to the size of the form when shown
3) I think this is the 'reference' used in 1) to Autocenter - which it unfortunately doesn't do !
Hope that clears up the mud !
Please explain if I misunderstood these properties - and then tell how they are to be used.