drop down list

Can you help me ?

I have a dropdown list and i want make another drop down list, but that this list is based in the before

You basically want to make dependable fields, unfortunately, SuiteCRM doesn’t have dependable fields option. you will need to create custom coding for this.

You can create dropdown fields from the studio in reference to the primary field value. Create onChange hook to call the respective drop-down and update the div.