     type: 'x'
     x: 'x'
     y: 'y'
-    size: 'small_size'
+    size: 'pixel_size'
     fill_color: 'colors'
     fill_alpha: 'alpha'
     line_width: 'lw'

    type: 'square'
    x: 'x'
    y: 'y'
    size: 'small_size'
    angle: 'angle'
    fill_alpha: 'alpha'
    fill_color: 'colors'

    type: 'circle_x'
    x: 'x'
    y: 'y'
    size: 'pixel_size'
    fill_color: 'colors'
    fill_alpha: 0.2
    line_width: 'lw'
