Checkbox is ✓ on screen but X for print/export

[mollyhsia]

Why does a checkbox show a '✓' when checked on the design or screen, but change to an 'X' when printed or exported to PDF?

Edit: Changed subject, was How checkboxes are displayed  Make your post understandable by others  -- MrProgrammer, forum moderator

[UnklDonald418]

For many years, computer monitors have been capable of displaying 32 bit Unicode symbols like the check-mark or tick or whatever you want to call them (there are more than one)
I suppose to maintain compatibility with older printers they are translated to 'x' which is an 8 bit ASCII symbol that even a TTY printer in the 1960's could generate.

Keep in mind that Forms are Writer documents and the AOO Writer module has seen significant updates but the AOO Base module has remained static since 2008.