How to populate a checkbox on my PDF using the value from a dropdown element?

I have a form that collects info and transfers it into multiple sections within the loaded PDF. On the first PDF it fills a section with a letter M or F (for the individuals gender) but I also need to duplicate/populate another section within the same document but as a check box as you see in the images above. How can I have a automate to (x) F when F Drop down is selected in form and vice versa (x) M when M dropdown is selected

Hi there,

Thank you for reaching out to us.

You can duplicate a linked field in PDF form. When you right-click on the linked field, you will see a white box, which can copy the field. Click on it and then drag and drop it anywhere in the form. It will populate the form field.

I hope this helps. Let us know if you need further assistance.

It does not because. I need the drop down selection it to correspond with a check box. Please review my screen shots and explanation again
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Hello, carvo83. 

Unfortunately, we cannot automatically mark the Spouse/Domestic Partner field on your PDF with a checkbox if you are using a dropdown choice. It will mark just one field on your PDF with F or M values. You can't also link the options to different fields, as you can do with a checkbox element. 

You can just change the dropdown to a checkbox to solve it. If you want to keep the dropdown, you can create a hidden checkbox that will be populated by conditions with the dropdown choice. Here is an example.

You can see that you can normally populate the field on your PDF with a form hidden element.

Please, let us know if you need anything else.

Have a great day 😀✨