I had that same problem a few years ago, you can achieve that using a lot of VBA code, as Access does not have a native solution, to my knowledge. In the product forum on the Microsoft website, you can find a feature request exactly like that being requested, so you see this a common issue.

I am not sure if Richard has covered this conundrum here, but in case he didn't I recommend you search for 'VBA Code to resize access forms based on monitor size'. But be prepared for a lot a of code and warnings that it may not work in certain conditions and many MVPs did not endorse making it's by VBA. As always, try and test heavily until it breaks before going 100% with the solution.

Yeah, like Diogo said, there's no EASY way to do it. I will be covering this in an upcoming video though. A lot of people have asked about it. Stay tuned.