How to use the regex () function to force the user to enter texts in upper case

[Kal_Lam]

You should be able to find the same in our support article Restricting Text Responses With Regular Expressions. Also, you could see a workaround discussed previously:

Restrict an entry with upper case and special characters while entering a form

Hi @PEHAN, Welcome to the community! You could do the same following the instructions outlined below: In the survey tab of your xlsform: [Image 1] Data entry screen as seen in Enketo: With a wrong entry [Image 1] Data entry screen as seen in Enketo: With a correct entry [Image 2] Reference xlsform: UPPER CASE (Regex).xlsx (10.1 KB) Have a great day!