Who it's for: Owners. Before you start: Bullhorn is connected (see Connect Bullhorn to Resume Builder). If the Candidately field doesn't exist yet, create it first (see Add a custom field).
Steps
Click your name at the bottom left, then Settings.
Under Integrations, click Bullhorn.
Scroll to Field mappings (marked Beta) > Candidate field mapping, and click Add new field.
In the new row, pick the Bullhorn field on the left, then the Candidately field it should fill on the right. Both lists can be searched. Only fields of a similar type can be mapped: fields that don't fit are greyed out.
Click Save changes in the bar at the bottom. To remove a mapping, click the X at the end of its row and save.
Result
When someone imports a candidate from Bullhorn, the mapped fields come in with the profile, along with name, job title, email, phone, address and skills.
Good to know
A mapped field only shows on the resume if it's in your candidate appearance. See A field is missing or wrong on the resume.
Edits you make in Candidately don't go back to the Bullhorn fields. To put the resume in Bullhorn, use Send to Bullhorn (see Save a resume to Bullhorn).