If you wish to change the name of a sheet, simply double-click on the its tab and type in a new name in the Rename Sheet dialog box which appears on your screen. A single period is treated as a decimal. All other combinations of numbers and nonnumeric characters are treated as text. All numbers are right-aligned in a cell. Select the cell you want to begin entering data and start typing in the information.
Text is automatically left-aligned in the cell.
The text appears in the cell and in the formula bar. Numbers are aligned to the right. This tells Excel to left align this data in the cell. This method will cause you problems if you use Excel data with an Access database or other database. It is better to change the cell number format to text.