I am guessing you have MS Office 2010. I don't have that version but try this. Open two spreadsheets, click on "Window" and you will see "Compare Side By Side". That will put both of them on the screen at one time.
My Computer
At a glance
Windows 7 Home Premium 32-Bit - Build 7600 SP1Intel Core i3-2120 3.30GhzKingston 4 GB DDR3 1333 mhzAMD Radeon HD6670
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom Build
OS
Windows 7 Home Premium 32-Bit - Build 7600 SP1
CPU
Intel Core i3-2120 3.30Ghz
Motherboard
Asus P8Z68-V LX Intel Z68 Socket H2 ATX
Memory
Kingston 4 GB DDR3 1333 mhz
Graphics Card(s)
AMD Radeon HD6670
Sound Card
Sound Blaster Audigy SE 24-Bit
Monitor(s) Displays
Asus VE228
Screen Resolution
1440 X 900
Hard Drives
OCZ Vertex 3 120 GB Sata 3 SSD ==
Kingston SH103/S3 120 G Hyper X 120 GB SSD ==
Western Digital 500 GB Caviar Green 7200 RPM ==
PSU
Corsair CX600M == 600 Watt
Case
NZXT Apollo - Silver with Clear Side Panel
Cooling
Three 120 mm Fans
Keyboard
Microsoft Natural 4000
Mouse
Microsoft Custom Optical 3000
Internet Speed
AT&T Fiber Optic Wireless Network
Antivirus
Microsoft Security Essentials
Browser
Chrome
Other Info
120 mm Blue LED Fan -- Three Blue LED Lazer Light Sticks
Yeah I don't get those options. Either I'm clicking on the wrong thing (I'm sure I'm not - but who knows, blond moments happen to everyone:sarc I don't get those options popping up.
When I go back to the office on Sunday morning, I'll take some screenshots, to better show what I'm talking about
I get side by side View in the same window, but I may as well cycle to looking at one at a time, since they do everything in unison. I'll take a mini vid of all the options it gives me, but I do not get those options as well /facepalm. I'm in the office at the crack of dawn tomorrow.
Are you trying to open two instances of the same spreadsheet? If so I would make a copy of the spreadsheet (with a different name) and then open the original and then open the copy.
So, it looks like you found the side by side button - but it is not exactly what you had hoped for. You can turn off the "do everything in unison" feature with just one click.
In the mean time, here is a video for turning on Side by Side and then turning off Synchronous Scrolling. This is from a fresh install of Office 2010 - so the tool bars should be normal.
Note: two spreadsheets are selected on the desktop before the video starts. Right clicking and selecting open - opens them both. You might want to watch the videos in full screen mode and at the highest resolution; otherwise, the tool tips might be hard to read.
And here is a video of how to just arrange windows - I picked vertical, you might want horizontal. Notice near the end that I arrange them again because I wanted book1 on the left. The spreadsheet that is selected when you arrange them will be placed on the left of the vertical view and on top in horizontal arrangements.