How can I make a button where one form closes as another opens?

I am making a start page to my DB with multiple buttons, I want a button to switch between different forms but I do not want there to be lots of them open after the user has selected a few different buttons.

Can I have a button to switch the current form (i.e. close one whilst opening another)?


Please can it be without this code I see all around the forum? If it needs code, can someone please tell me how to use it? Thanks :)