How do allow users to either choose from dropdown list or enter a new value?

[Tiger1]

I have a table that has values already in it. I want the user to be able to either:

Choose their name from the list
Or
Enter their name if they are not in the table yet.

This is what i have yet it doesn’t do what i want:

Here it will not let me add a new value (person):

[Steve · Accepted solution]

Use Suggested values rather than Valid If.

help.appsheet.com

Suggested Values for a Column

How to suggest a dynamic list of values for a column

[Tiger1]

Worked Perfect. Thanks again Steve.