Let's say you want to convert text from uppercase to lowercase or from lowercase to proper case to make it more readable. To change the case of text, use the UPPER, LOWER, or PROPER functions.
The example may be easier to understand if you copy it to a blank worksheet.
How to copy an example
Create a blank workbook or worksheet.
Select the example in the Help topic.
Note Do not select the row or column headers.
Selecting an example from Help
In the worksheet, select cell A1, and press CTRL+V.
To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.
Formula Description (Result)
=UPPER(A2) Changes text to all UPPERCASE (NANCY DAVOLIO)
=LOWER(A2) Changes text to all lowercase (nancy davolio)
=PROPER(A2) Changes text to Title Case (Nancy Davolio)