Populate field using dropdown selection

How i can select in a drop down, for eexample, vehicule  and the other dropdown autocomple in model.

Example:

Select: Alfa romeo in firts dropdown

in the second autocomplete in model..

Thank

Hi, 

If I understand your question correctly, you want your selection from the first dropdown to populate the 2nd text field with the model? 

You can achieve that using conditional logic, using the "UPDATE/CALCULATE FIELD" option, you can add a value to be populated in the in 2nd field. 

I have cloned your form and added a sample condition:

Here's the condition I added:

Here's my cloned version of your form, you can view/clone it for reference via this link:

https://form.jotformpro.com/71523642531955

Here's how to clone a form into your account:

How-to-Clone-an-Existing-Form-from-a-URL

Hope this helps, let us know if you need any further help.

Thank you!