override the global redactor settings

gistfile1.yml

fields:
  
  spa_packages_grid:
    display: Spa Packages
    type: grid
    fields:
      spa_packages_title:
        display: Title
        type: text
      spa_packages_body:
        display: Body
        type: redactor
        buttons:
          - bold
          - italic
          - '|'
          - unorderedlist
          - orderedlist
          - '|'
          - html