Create a Combo Box Field in a PDF

A combo box provides a drop-down list. Users can select one item from the list.

Add a combo box field

1. Open the PDF in Nitro PDF Pro
2. On the Forms tab, in the Form Fields group, click Combo Box
3. Drag the pointer on the page to create the field
4. Open the field properties:
   1. Double-click the field
   2. Or right-click the field and select Properties
5. Set the field name and appearance. Use one of these options:
   1. The Properties context tab
   2. The Properties dialog
      
6. Open the Options tab:
   1. From the context tab, click Properties > Options
   2. From the dialog, click Options

Add and manage list items

1. In the Item field, enter a name
   
2. Click Add to add the item to the list
3. In the Export Value field, enter a value
4. Repeat these steps to add more items
5. To manage items:
   1. Select Sort Items to sort the list alphabetically
   2. Use Up or Down to reorder items manually
   3. Select an item and click Delete to remove it
6. To allow user input, select Allow custom text input

Configure additional settings

• Format:
  Select a format (for example, date or custom format)
  
• Validate:
  • Select Run custom validation script
  • Enter JavaScript to validate the data
    
• Calculate:
  Select a calculation option if required
  

Edit a combo box field

1. Open the PDF in Nitro PDF Pro
2. On the Forms tab, in the Form Fields group, do one of the following:
   1. Click the field type
   2. Click Select Fields
3. Double-click the field to edit its properties