Sure, I can help you with that! Here's how you can turn on the View Side by Side option in Excel 2007:

1. Open the Excel workbook that contains the two sheets you want to view side by side.
2. Click on the View tab in the ribbon at the top of the screen.
3. Look for the Window section in the ribbon and click on the View Side by Side button.

If the View Side by Side button is grayed out, it means that Excel is unable to display the two sheets side by side. This could be because the workbook is maximized or minimized, or because the two sheets are not adjacent to each other.

To fix this, try one of the following:

1. Click on the Arrange All button in the Window section of the ribbon, and select Vertical or Horizontal to arrange the windows side by side.
2. Resize the Excel window so that it is not maximized or minimized.
3. Move the two sheets so that they are adjacent to each other within the workbook.

Once you have the two sheets displayed side by side, you can use the Synchronous Scrolling button in the Window section of the ribbon to scroll both sheets at the same time.