Is there any way to delete the 'last name' box on a form?

Hi there, my name is James and I'm new to Squarespace.

I've created a contact form for my website and I'd like to delete the 'last name' box if possible, is there any way I can do this?

Thanks.

Thank you!

If I replace the first/last field with a text field, will the first name still populate as their first name in my subscriber mailing list?