Working in multiple spreadsheets - highlighting (Excel 2013)

[terlynn_1370]

I frequently work in two spreadsheets simultaneously.  I highlight in both.  My problem is now that we're using Excel 2013, when I change the highlight color in one spreadsheet, it changes it in the second spreadsheet too.  How can I keep these separate?

[#2]

What do you mean by highlight color? Can you show us a screenshot?

[#3]

Highlighting cells.  On one worksheet I'm highlighting the cells gray when the item is complete, and the other I'm highlighting yellow.  When I select the highlight color on one worksheet window, it changes it on the other window as well.  I have to change it every time I go to each worksheet.  @Jan Karel Pieterse 

[#4]

@terlynn_1370 Are you by any chance referring to this button (the one with the red box around it):

 

If yes, then the only way to achieve what you need is by launching a second instance of Excel. In Windows Excel you do so by holding down the Alt key while starting Excel.