Hey so for some reason the screen in Cubase changed and I don't know how to get it back. When I first got Cubase and installed it, my screen looked like this (random pic I got from the web):

But, for some strange reason, I opened up Cubase after working on a project to find that my screen was now like this (and NO, not that it suddenly went from Mac to PC lol):

If you don't see it, for some reason that left part of the screen went missing, which I really want to get back but I don't see any options in the menus to bring back that left side. Heck, I don't even know what to search for cause I have no idea what that side is called. Anyone know how to get that left side back?
Current/Main Gear
'06 MIA Fender Stratocaster
'97 Epiphone Les Paul Standard Lim. Ed.
'90s Peavey Classic 30
H&K Tubemeister 18
MXR 404 CAE Crybaby
Ibanez TS9
Ernie Ball Jr. Volume
Digitech Hardwire DL-8
TC Electronic Nova Repeater