The home bar and stuff have all moved to the left side of my screen suddenly and it's terrible any help getting it moved back I cannot find the setting if there is one

I woke up today and went to use credit and found that the home bar and options and stuff are all permanently on the left side of my screen instead of at the bottom like they usually are it takes up way more of the screen and makes everything squished and narrow I cannot find a way to change this back and some googling suggests that it might be a b layout testing is there any way for me to tell them that this is a terrible layout or for me to change it back?