In Word, you can use the SHIFT+F3 shortcut key to achieve uppercase and lowercase conversions in English.
First select the English language you want to convert
Press SHIFT+F3 for the first time to convert the selected English initials to uppercase;
Press SHIFT+F3 for the second time to convert all selected English to uppercase;
Press SHIFT+F3 for the third time to convert all selected English to lowercase;
Knowledge Extension:
If you have more data for Excel cells, you need to convert the case to more cells, you can do this:
Select the cell in which you want to convert the case, copy and paste it to a new document in Word, so that the table is automatically generated in Word. Then, select the table in Word and use the SHIFT+F3 shortcut key to convert the case;
After the conversion succeeds, the word data is copied and pasted into Excel, which makes it successful.