Form Fields not accepting new values

edited 12/09/19 in Smartsheet Basics

I created a form for a smartsheet. Within the smartsheet, i have drop down fields for city, state and zip and included the most common values people will need for those fields. I did NOT click the box that states "Restrict to values only" knowing that occasionally there will be an outlier. However, when someone fills in the form, they are unable to add a different value. Can someone help me change the properties so that new cities, states or zips? TIA