How to Merge Cells
Study the spreadsheet below:
If you look at Row 1, you'll see that the "Shopping Bill" heading stretches across three cells. This is not three separate cells, with a colour change for each individual cell. The A1, B1 and C1 cells were merged. To merge cells, do the following.
Click on "Merge and Center". Your three cells will then become one - A1, to be exact!