I have recently created a D365 trial to play around and find out the new features or changes in latest version.
For my surprise i could only see, Module menu’s but no place to customize the system to play around.
I hope most of you would have seen the same.
I was talking to one of my colleagues and he has given me couple of words to add in your URL after main.aspx which will show or allow you to customize the system.
that did a magic and i can see the Settings menu to customize.
My URL was like this which used to show me all the available apps to open one of them.
But after ?forceClassic=1#880971822 my URL will look like below
Hope it helps!!