To move and/or resize fields in a fillable PDF, open the PDF mapper and click the “Toggle edit mode” button. Once the edit mode is active (the button will stay green) you will be able to move and resize the fields by dragging them on the page.
Active in edit mode (green indicates you are in edit mode)
Click on any field where you can then resize and/or move it.
Click on the edit mode button again and your changes you've made will now be saved.
Keyword: PDF Mapper