I have a CSV file that is used for marking users against columns which is imported into an application. The administrators will mark cells with a specified character to denote a selection. What is the most suitable character to use that would make most sense to a user for selection? A number of options I have considered are:
- Any character denotes a selection
- The number '1'
- The letter 'y' (this may implicitly lead the user to entering 'n' for the other column and is not global)