For more, see Layer Tools
To activate: Layer Tools / Advanced Tools tab
Forces all of the text values of a selected field into upper case.
To use:
Open Layer Tools, Advanced Tools tab.
Select desired layer.
Select FORCE UPPERCASE tool.
Click Run Tool. The Force Upper Case dialog opens.
Select the field to edit using the drop-down list.
Select Apply.
Repeat steps 5 and 6 as needed.
When finished, click CANCEL.