What used to be known as Tabs across the top has moved to the left column.
If you have too many tabs for all to show, you’ll see the “More” link. Click that to expand the list.
Then select “Edit” so you can move them around.
Now you can mouse over them “click/hold” to drag them around. Hit the “x” to delete a tab completely. Wall and Info tabs are locked into the 1 st and 2 nd positions. When you’re finished, click on “Wall” to exit the edit mode.