# Update Contact Fields > **Who can use this Card?** > > * Gallabox Users having permission to either build and deploy bots or manage bots. > * Available on all paid plans. This card can be used to Update the Contact fields that you ask from your customers like their name, contact number, email, their availability, or any instruction they have given.

After choosing the field that you would like to update and the value for the field, you have to select the operation in some cases: -> Choose **Replace**, if you want to update the previous contact details with new details. -> Choose **Add if Empty**, to add the contact details to a particular contact. -> Choose **Append**, if you want to add more to the details.

You can see the updated contact fields in the **Contact** section of Gallabox.

To change the Marketing Opt-ins, follow the below GIF:

{% hint style="info" %} To know more about how to create and update the Fields in Gallabox [click here](https://docs.gallabox.com/basic-modules/contact-fields#create-a-contact-field). {% endhint %}