UI Page - Can You Remove Margin?

Hi, this is the code, it’s nothing more than create a new page and choose a fixed canvass layout:

config:
  layoutType: fixed
  fixedType: canvas
  label: test_CanvassPage
blocks: []
masonry: null
grid: []
canvas:
  - component: oh-canvas-layer
    config: {}
    slots:
      default:
        - component: oh-canvas-item
          config:
            x: 20
            y: 20
            h: 150
            w: 200
          slots:
            default:
              - component: oh-label-card
                config:
                  title: Test Label Card
                  footer: Footer
                  action: command
                  actionCommand: MyCommand
                  item: myItem