Multiple text entry fields, allow only one to be used
Can't find an answer for this one. Hoping someone can help.
I need to develop an interaction with multiple text entry fields. However, I only want the student to be able to place text in one field.
I am recreating a system screen, where the user types the letter 'D" next to a menu option and presses enter. I plan on using a screen shot with multiple text input fields with space for one letter. I only want them to be able to place text in one of these boxes, whichever they choose, press enter, then something happens depending on which box they put the text in.
Any thoughts on how to restrict them to only using one text entry box out of many? Basically I need the text entry fields to function almost like a button set.
Thank you in advance for your help.